*
* CDDL HEADER END
*/
+
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2017 by Delphix. All rights reserved.
+ * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
+ * Copyright (c) 2013, Joyent, Inc. All rights reserved.
+ * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
+ * Copyright (c) 2015, STRATO AG, Inc. All rights reserved.
+ * Copyright (c) 2016 Actifio, Inc. All rights reserved.
+ * Copyright 2017 Nexenta Systems, Inc.
+ * Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
*/
+/* Portions Copyright 2010 Robert Milkowski */
+
+#include <sys/zfeature.h>
#include <sys/cred.h>
#include <sys/zfs_context.h>
#include <sys/dmu_objset.h>
#include <sys/dbuf.h>
#include <sys/zvol.h>
#include <sys/dmu_tx.h>
-#include <sys/zio_checksum.h>
#include <sys/zap.h>
#include <sys/zil.h>
#include <sys/dmu_impl.h>
#include <sys/zfs_ioctl.h>
+#include <sys/sa.h>
+#include <sys/zfs_onexit.h>
+#include <sys/dsl_destroy.h>
+#include <sys/vdev.h>
+#include <sys/policy.h>
+#include <sys/spa_impl.h>
+#include <sys/dmu_send.h>
+
+/*
+ * Needed to close a window in dnode_move() that allows the objset to be freed
+ * before it can be safely accessed.
+ */
+krwlock_t os_lock;
+
+/*
+ * Tunable to overwrite the maximum number of threads for the parallelization
+ * of dmu_objset_find_dp, needed to speed up the import of pools with many
+ * datasets.
+ * Default is 4 times the number of leaf vdevs.
+ */
+int dmu_find_threads = 0;
+
+/*
+ * Backfill lower metadnode objects after this many have been freed.
+ * Backfilling negatively impacts object creation rates, so only do it
+ * if there are enough holes to fill.
+ */
+int dmu_rescan_dnode_threshold = 1 << DN_MAX_INDBLKSHIFT;
+
+static char *upgrade_tag = "upgrade_tag";
+
+static void dmu_objset_find_dp_cb(void *arg);
+
+static void dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb);
+static void dmu_objset_upgrade_stop(objset_t *os);
+
+void
+dmu_objset_init(void)
+{
+ rw_init(&os_lock, NULL, RW_DEFAULT, NULL);
+}
+
+void
+dmu_objset_fini(void)
+{
+ rw_destroy(&os_lock);
+}
spa_t *
dmu_objset_spa(objset_t *os)
{
- return (os->os->os_spa);
+ return (os->os_spa);
}
zilog_t *
dmu_objset_zil(objset_t *os)
{
- return (os->os->os_zil);
+ return (os->os_zil);
}
dsl_pool_t *
{
dsl_dataset_t *ds;
- if ((ds = os->os->os_dsl_dataset) != NULL && ds->ds_dir)
+ if ((ds = os->os_dsl_dataset) != NULL && ds->ds_dir)
return (ds->ds_dir->dd_pool);
else
- return (spa_get_dsl(os->os->os_spa));
+ return (spa_get_dsl(os->os_spa));
}
dsl_dataset_t *
dmu_objset_ds(objset_t *os)
{
- return (os->os->os_dsl_dataset);
+ return (os->os_dsl_dataset);
}
dmu_objset_type_t
dmu_objset_type(objset_t *os)
{
- return (os->os->os_phys->os_type);
+ return (os->os_phys->os_type);
}
void
dmu_objset_name(objset_t *os, char *buf)
{
- dsl_dataset_name(os->os->os_dsl_dataset, buf);
+ dsl_dataset_name(os->os_dsl_dataset, buf);
}
uint64_t
dmu_objset_id(objset_t *os)
{
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
return (ds ? ds->ds_object : 0);
}
+uint64_t
+dmu_objset_dnodesize(objset_t *os)
+{
+ return (os->os_dnodesize);
+}
+
+zfs_sync_type_t
+dmu_objset_syncprop(objset_t *os)
+{
+ return (os->os_sync);
+}
+
+zfs_logbias_op_t
+dmu_objset_logbias(objset_t *os)
+{
+ return (os->os_logbias);
+}
+
static void
checksum_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance should have been done by now.
*/
ASSERT(newval != ZIO_CHECKSUM_INHERIT);
- osi->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
+ os->os_checksum = zio_checksum_select(newval, ZIO_CHECKSUM_ON_VALUE);
}
static void
compression_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance and range checking should have been done by now.
*/
ASSERT(newval != ZIO_COMPRESS_INHERIT);
- osi->os_compress = zio_compress_select(newval, ZIO_COMPRESS_ON_VALUE);
+ os->os_compress = zio_compress_select(os->os_spa, newval,
+ ZIO_COMPRESS_ON);
}
static void
copies_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance and range checking should have been done by now.
*/
ASSERT(newval > 0);
- ASSERT(newval <= spa_max_replication(osi->os_spa));
+ ASSERT(newval <= spa_max_replication(os->os_spa));
- osi->os_copies = newval;
+ os->os_copies = newval;
+}
+
+static void
+dedup_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+ spa_t *spa = os->os_spa;
+ enum zio_checksum checksum;
+
+ /*
+ * Inheritance should have been done by now.
+ */
+ ASSERT(newval != ZIO_CHECKSUM_INHERIT);
+
+ checksum = zio_checksum_dedup_select(spa, newval, ZIO_CHECKSUM_OFF);
+
+ os->os_dedup_checksum = checksum & ZIO_CHECKSUM_MASK;
+ os->os_dedup_verify = !!(checksum & ZIO_CHECKSUM_VERIFY);
}
static void
primary_cache_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance and range checking should have been done by now.
ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
newval == ZFS_CACHE_METADATA);
- osi->os_primary_cache = newval;
+ os->os_primary_cache = newval;
}
static void
secondary_cache_changed_cb(void *arg, uint64_t newval)
{
- objset_impl_t *osi = arg;
+ objset_t *os = arg;
/*
* Inheritance and range checking should have been done by now.
ASSERT(newval == ZFS_CACHE_ALL || newval == ZFS_CACHE_NONE ||
newval == ZFS_CACHE_METADATA);
- osi->os_secondary_cache = newval;
+ os->os_secondary_cache = newval;
+}
+
+static void
+sync_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+
+ /*
+ * Inheritance and range checking should have been done by now.
+ */
+ ASSERT(newval == ZFS_SYNC_STANDARD || newval == ZFS_SYNC_ALWAYS ||
+ newval == ZFS_SYNC_DISABLED);
+
+ os->os_sync = newval;
+ if (os->os_zil)
+ zil_set_sync(os->os_zil, newval);
+}
+
+static void
+redundant_metadata_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+
+ /*
+ * Inheritance and range checking should have been done by now.
+ */
+ ASSERT(newval == ZFS_REDUNDANT_METADATA_ALL ||
+ newval == ZFS_REDUNDANT_METADATA_MOST);
+
+ os->os_redundant_metadata = newval;
+}
+
+static void
+dnodesize_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+
+ switch (newval) {
+ case ZFS_DNSIZE_LEGACY:
+ os->os_dnodesize = DNODE_MIN_SIZE;
+ break;
+ case ZFS_DNSIZE_AUTO:
+ /*
+ * Choose a dnode size that will work well for most
+ * workloads if the user specified "auto". Future code
+ * improvements could dynamically select a dnode size
+ * based on observed workload patterns.
+ */
+ os->os_dnodesize = DNODE_MIN_SIZE * 2;
+ break;
+ case ZFS_DNSIZE_1K:
+ case ZFS_DNSIZE_2K:
+ case ZFS_DNSIZE_4K:
+ case ZFS_DNSIZE_8K:
+ case ZFS_DNSIZE_16K:
+ os->os_dnodesize = newval;
+ break;
+ }
+}
+
+static void
+logbias_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+
+ ASSERT(newval == ZFS_LOGBIAS_LATENCY ||
+ newval == ZFS_LOGBIAS_THROUGHPUT);
+ os->os_logbias = newval;
+ if (os->os_zil)
+ zil_set_logbias(os->os_zil, newval);
+}
+
+static void
+recordsize_changed_cb(void *arg, uint64_t newval)
+{
+ objset_t *os = arg;
+
+ os->os_recordsize = newval;
}
void
{
objset_phys_t *osp = buf;
- ASSERT(size == sizeof (objset_phys_t));
+ ASSERT(size == OBJSET_OLD_PHYS_SIZE || size == sizeof (objset_phys_t));
dnode_byteswap(&osp->os_meta_dnode);
byteswap_uint64_array(&osp->os_zil_header, sizeof (zil_header_t));
osp->os_type = BSWAP_64(osp->os_type);
+ osp->os_flags = BSWAP_64(osp->os_flags);
+ if (size == sizeof (objset_phys_t)) {
+ dnode_byteswap(&osp->os_userused_dnode);
+ dnode_byteswap(&osp->os_groupused_dnode);
+ }
+}
+
+/*
+ * The hash is a CRC-based hash of the objset_t pointer and the object number.
+ */
+static uint64_t
+dnode_hash(const objset_t *os, uint64_t obj)
+{
+ uintptr_t osv = (uintptr_t)os;
+ uint64_t crc = -1ULL;
+
+ ASSERT(zfs_crc64_table[128] == ZFS_CRC64_POLY);
+ /*
+ * The low 6 bits of the pointer don't have much entropy, because
+ * the objset_t is larger than 2^6 bytes long.
+ */
+ crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (osv >> 6)) & 0xFF];
+ crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 0)) & 0xFF];
+ crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 8)) & 0xFF];
+ crc = (crc >> 8) ^ zfs_crc64_table[(crc ^ (obj >> 16)) & 0xFF];
+
+ crc ^= (osv>>14) ^ (obj>>24);
+
+ return (crc);
+}
+
+unsigned int
+dnode_multilist_index_func(multilist_t *ml, void *obj)
+{
+ dnode_t *dn = obj;
+ return (dnode_hash(dn->dn_objset, dn->dn_object) %
+ multilist_get_num_sublists(ml));
}
int
dmu_objset_open_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
- objset_impl_t **osip)
+ objset_t **osp)
{
- objset_impl_t *osi;
+ objset_t *os;
int i, err;
ASSERT(ds == NULL || MUTEX_HELD(&ds->ds_opening_lock));
- osi = kmem_zalloc(sizeof (objset_impl_t), KM_SLEEP);
- osi->os.os = osi;
- osi->os_dsl_dataset = ds;
- osi->os_spa = spa;
- osi->os_rootbp = bp;
- if (!BP_IS_HOLE(osi->os_rootbp)) {
- uint32_t aflags = ARC_WAIT;
- zbookmark_t zb;
- zb.zb_objset = ds ? ds->ds_object : 0;
- zb.zb_object = 0;
- zb.zb_level = -1;
- zb.zb_blkid = 0;
- if (DMU_OS_IS_L2CACHEABLE(osi))
- aflags |= ARC_L2CACHE;
-
- dprintf_bp(osi->os_rootbp, "reading %s", "");
- /*
- * NB: when bprewrite scrub can change the bp,
- * and this is called from dmu_objset_open_ds_os, the bp
- * could change, and we'll need a lock.
- */
- err = arc_read_nolock(NULL, spa, osi->os_rootbp,
- arc_getbuf_func, &osi->os_phys_buf,
- ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &aflags, &zb);
- if (err) {
- kmem_free(osi, sizeof (objset_impl_t));
+ os = kmem_zalloc(sizeof (objset_t), KM_SLEEP);
+ os->os_dsl_dataset = ds;
+ os->os_spa = spa;
+ os->os_rootbp = bp;
+ if (!BP_IS_HOLE(os->os_rootbp)) {
+ arc_flags_t aflags = ARC_FLAG_WAIT;
+ zbookmark_phys_t zb;
+ enum zio_flag zio_flags = ZIO_FLAG_CANFAIL;
+ SET_BOOKMARK(&zb, ds ? ds->ds_object : DMU_META_OBJSET,
+ ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+
+ if (DMU_OS_IS_L2CACHEABLE(os))
+ aflags |= ARC_FLAG_L2CACHE;
+
+ if (ds != NULL && ds->ds_dir->dd_crypto_obj != 0) {
+ ASSERT3U(BP_GET_COMPRESS(bp), ==, ZIO_COMPRESS_OFF);
+ ASSERT(BP_IS_AUTHENTICATED(bp));
+ zio_flags |= ZIO_FLAG_RAW;
+ }
+
+ dprintf_bp(os->os_rootbp, "reading %s", "");
+ err = arc_read(NULL, spa, os->os_rootbp,
+ arc_getbuf_func, &os->os_phys_buf,
+ ZIO_PRIORITY_SYNC_READ, zio_flags, &aflags, &zb);
+ if (err != 0) {
+ kmem_free(os, sizeof (objset_t));
/* convert checksum errors into IO errors */
if (err == ECKSUM)
- err = EIO;
+ err = SET_ERROR(EIO);
return (err);
}
- osi->os_phys = osi->os_phys_buf->b_data;
+
+ /* Increase the blocksize if we are permitted. */
+ if (spa_version(spa) >= SPA_VERSION_USERSPACE &&
+ arc_buf_size(os->os_phys_buf) < sizeof (objset_phys_t)) {
+ arc_buf_t *buf = arc_alloc_buf(spa, &os->os_phys_buf,
+ ARC_BUFC_METADATA, sizeof (objset_phys_t));
+ bzero(buf->b_data, sizeof (objset_phys_t));
+ bcopy(os->os_phys_buf->b_data, buf->b_data,
+ arc_buf_size(os->os_phys_buf));
+ arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
+ os->os_phys_buf = buf;
+ }
+
+ os->os_phys = os->os_phys_buf->b_data;
+ os->os_flags = os->os_phys->os_flags;
} else {
- osi->os_phys_buf = arc_buf_alloc(spa, sizeof (objset_phys_t),
- &osi->os_phys_buf, ARC_BUFC_METADATA);
- osi->os_phys = osi->os_phys_buf->b_data;
- bzero(osi->os_phys, sizeof (objset_phys_t));
+ int size = spa_version(spa) >= SPA_VERSION_USERSPACE ?
+ sizeof (objset_phys_t) : OBJSET_OLD_PHYS_SIZE;
+ os->os_phys_buf = arc_alloc_buf(spa, &os->os_phys_buf,
+ ARC_BUFC_METADATA, size);
+ os->os_phys = os->os_phys_buf->b_data;
+ bzero(os->os_phys, size);
}
/*
* default (fletcher2/off). Snapshots don't need to know about
* checksum/compression/copies.
*/
- if (ds) {
- err = dsl_prop_register(ds, "primarycache",
- primary_cache_changed_cb, osi);
- if (err == 0)
- err = dsl_prop_register(ds, "secondarycache",
- secondary_cache_changed_cb, osi);
- if (!dsl_dataset_is_snapshot(ds)) {
- if (err == 0)
- err = dsl_prop_register(ds, "checksum",
- checksum_changed_cb, osi);
- if (err == 0)
- err = dsl_prop_register(ds, "compression",
- compression_changed_cb, osi);
- if (err == 0)
- err = dsl_prop_register(ds, "copies",
- copies_changed_cb, osi);
+ if (ds != NULL) {
+ boolean_t needlock = B_FALSE;
+
+ os->os_encrypted = (ds->ds_dir->dd_crypto_obj != 0);
+
+ /*
+ * Note: it's valid to open the objset if the dataset is
+ * long-held, in which case the pool_config lock will not
+ * be held.
+ */
+ if (!dsl_pool_config_held(dmu_objset_pool(os))) {
+ needlock = B_TRUE;
+ dsl_pool_config_enter(dmu_objset_pool(os), FTAG);
+ }
+
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_PRIMARYCACHE),
+ primary_cache_changed_cb, os);
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_SECONDARYCACHE),
+ secondary_cache_changed_cb, os);
+ }
+ if (!ds->ds_is_snapshot) {
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_CHECKSUM),
+ checksum_changed_cb, os);
+ }
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_COMPRESSION),
+ compression_changed_cb, os);
+ }
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_COPIES),
+ copies_changed_cb, os);
+ }
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_DEDUP),
+ dedup_changed_cb, os);
+ }
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_LOGBIAS),
+ logbias_changed_cb, os);
+ }
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_SYNC),
+ sync_changed_cb, os);
+ }
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(
+ ZFS_PROP_REDUNDANT_METADATA),
+ redundant_metadata_changed_cb, os);
+ }
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
+ recordsize_changed_cb, os);
+ }
+ if (err == 0) {
+ err = dsl_prop_register(ds,
+ zfs_prop_to_name(ZFS_PROP_DNODESIZE),
+ dnodesize_changed_cb, os);
+ }
}
- if (err) {
- VERIFY(arc_buf_remove_ref(osi->os_phys_buf,
- &osi->os_phys_buf) == 1);
- kmem_free(osi, sizeof (objset_impl_t));
+ if (needlock)
+ dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
+ if (err != 0) {
+ arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
+ kmem_free(os, sizeof (objset_t));
return (err);
}
- } else if (ds == NULL) {
+ } else {
/* It's the meta-objset. */
- osi->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
- osi->os_compress = ZIO_COMPRESS_LZJB;
- osi->os_copies = spa_max_replication(spa);
- osi->os_primary_cache = ZFS_CACHE_ALL;
- osi->os_secondary_cache = ZFS_CACHE_ALL;
+ os->os_checksum = ZIO_CHECKSUM_FLETCHER_4;
+ os->os_compress = ZIO_COMPRESS_ON;
+ os->os_encrypted = B_FALSE;
+ os->os_copies = spa_max_replication(spa);
+ os->os_dedup_checksum = ZIO_CHECKSUM_OFF;
+ os->os_dedup_verify = B_FALSE;
+ os->os_logbias = ZFS_LOGBIAS_LATENCY;
+ os->os_sync = ZFS_SYNC_STANDARD;
+ os->os_primary_cache = ZFS_CACHE_ALL;
+ os->os_secondary_cache = ZFS_CACHE_ALL;
+ os->os_dnodesize = DNODE_MIN_SIZE;
}
- osi->os_zil_header = osi->os_phys->os_zil_header;
- osi->os_zil = zil_alloc(&osi->os, &osi->os_zil_header);
+ if (ds == NULL || !ds->ds_is_snapshot)
+ os->os_zil_header = os->os_phys->os_zil_header;
+ os->os_zil = zil_alloc(os, &os->os_zil_header);
for (i = 0; i < TXG_SIZE; i++) {
- list_create(&osi->os_dirty_dnodes[i], sizeof (dnode_t),
- offsetof(dnode_t, dn_dirty_link[i]));
- list_create(&osi->os_free_dnodes[i], sizeof (dnode_t),
- offsetof(dnode_t, dn_dirty_link[i]));
+ os->os_dirty_dnodes[i] = multilist_create(sizeof (dnode_t),
+ offsetof(dnode_t, dn_dirty_link[i]),
+ dnode_multilist_index_func);
}
- list_create(&osi->os_dnodes, sizeof (dnode_t),
+ list_create(&os->os_dnodes, sizeof (dnode_t),
offsetof(dnode_t, dn_link));
- list_create(&osi->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
+ list_create(&os->os_downgraded_dbufs, sizeof (dmu_buf_impl_t),
offsetof(dmu_buf_impl_t, db_link));
- mutex_init(&osi->os_lock, NULL, MUTEX_DEFAULT, NULL);
- mutex_init(&osi->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
- mutex_init(&osi->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
+ list_link_init(&os->os_evicting_node);
+
+ mutex_init(&os->os_lock, NULL, MUTEX_DEFAULT, NULL);
+ mutex_init(&os->os_userused_lock, NULL, MUTEX_DEFAULT, NULL);
+ mutex_init(&os->os_obj_lock, NULL, MUTEX_DEFAULT, NULL);
+ mutex_init(&os->os_user_ptr_lock, NULL, MUTEX_DEFAULT, NULL);
+ os->os_obj_next_percpu_len = boot_ncpus;
+ os->os_obj_next_percpu = kmem_zalloc(os->os_obj_next_percpu_len *
+ sizeof (os->os_obj_next_percpu[0]), KM_SLEEP);
+
+ dnode_special_open(os, &os->os_phys->os_meta_dnode,
+ DMU_META_DNODE_OBJECT, &os->os_meta_dnode);
+ if (arc_buf_size(os->os_phys_buf) >= sizeof (objset_phys_t)) {
+ dnode_special_open(os, &os->os_phys->os_userused_dnode,
+ DMU_USERUSED_OBJECT, &os->os_userused_dnode);
+ dnode_special_open(os, &os->os_phys->os_groupused_dnode,
+ DMU_GROUPUSED_OBJECT, &os->os_groupused_dnode);
+ }
+
+ mutex_init(&os->os_upgrade_lock, NULL, MUTEX_DEFAULT, NULL);
+
+ *osp = os;
+ return (0);
+}
- osi->os_meta_dnode = dnode_special_open(osi,
- &osi->os_phys->os_meta_dnode, DMU_META_DNODE_OBJECT);
+int
+dmu_objset_from_ds(dsl_dataset_t *ds, objset_t **osp)
+{
+ int err = 0;
/*
- * We should be the only thread trying to do this because we
- * have ds_opening_lock
+ * We shouldn't be doing anything with dsl_dataset_t's unless the
+ * pool_config lock is held, or the dataset is long-held.
*/
- if (ds) {
- VERIFY(NULL == dsl_dataset_set_user_ptr(ds, osi,
- dmu_objset_evict));
+ ASSERT(dsl_pool_config_held(ds->ds_dir->dd_pool) ||
+ dsl_dataset_long_held(ds));
+
+ mutex_enter(&ds->ds_opening_lock);
+ if (ds->ds_objset == NULL) {
+ objset_t *os;
+ rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
+ err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
+ ds, dsl_dataset_get_blkptr(ds), &os);
+ rrw_exit(&ds->ds_bp_rwlock, FTAG);
+
+ if (err == 0) {
+ mutex_enter(&ds->ds_lock);
+ ASSERT(ds->ds_objset == NULL);
+ ds->ds_objset = os;
+ mutex_exit(&ds->ds_lock);
+ }
}
+ *osp = ds->ds_objset;
+ mutex_exit(&ds->ds_opening_lock);
+ return (err);
+}
- *osip = osi;
- return (0);
+/*
+ * Holds the pool while the objset is held. Therefore only one objset
+ * can be held at a time.
+ */
+int
+dmu_objset_hold_flags(const char *name, boolean_t decrypt, void *tag,
+ objset_t **osp)
+{
+ dsl_pool_t *dp;
+ dsl_dataset_t *ds;
+ int err;
+ ds_hold_flags_t flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0;
+
+ err = dsl_pool_hold(name, tag, &dp);
+ if (err != 0)
+ return (err);
+ err = dsl_dataset_hold_flags(dp, name, flags, tag, &ds);
+ if (err != 0) {
+ dsl_pool_rele(dp, tag);
+ return (err);
+ }
+
+ err = dmu_objset_from_ds(ds, osp);
+ if (err != 0) {
+ dsl_dataset_rele(ds, tag);
+ dsl_pool_rele(dp, tag);
+ }
+
+ return (err);
+}
+
+int
+dmu_objset_hold(const char *name, void *tag, objset_t **osp)
+{
+ return (dmu_objset_hold_flags(name, B_FALSE, tag, osp));
}
static int
-dmu_objset_open_ds_os(dsl_dataset_t *ds, objset_t *os, dmu_objset_type_t type)
+dmu_objset_own_impl(dsl_dataset_t *ds, dmu_objset_type_t type,
+ boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp)
{
- objset_impl_t *osi;
+ int err;
- mutex_enter(&ds->ds_opening_lock);
- osi = dsl_dataset_get_user_ptr(ds);
- if (osi == NULL) {
- int err;
+ err = dmu_objset_from_ds(ds, osp);
+ if (err != 0) {
+ return (err);
+ } else if (type != DMU_OST_ANY && type != (*osp)->os_phys->os_type) {
+ return (SET_ERROR(EINVAL));
+ } else if (!readonly && dsl_dataset_is_snapshot(ds)) {
+ return (SET_ERROR(EROFS));
+ }
- err = dmu_objset_open_impl(dsl_dataset_get_spa(ds),
- ds, &ds->ds_phys->ds_bp, &osi);
- if (err) {
- mutex_exit(&ds->ds_opening_lock);
+ /* if we are decrypting, we can now check MACs in os->os_phys_buf */
+ if (decrypt && arc_is_unauthenticated((*osp)->os_phys_buf)) {
+ err = arc_untransform((*osp)->os_phys_buf, (*osp)->os_spa,
+ ds->ds_object, B_FALSE);
+ if (err != 0)
return (err);
- }
- }
- mutex_exit(&ds->ds_opening_lock);
- os->os = osi;
- os->os_mode = DS_MODE_NOHOLD;
+ ASSERT0(arc_is_unauthenticated((*osp)->os_phys_buf));
+ }
- if (type != DMU_OST_ANY && type != os->os->os_phys->os_type)
- return (EINVAL);
return (0);
}
+/*
+ * dsl_pool must not be held when this is called.
+ * Upon successful return, there will be a longhold on the dataset,
+ * and the dsl_pool will not be held.
+ */
int
-dmu_objset_open_ds(dsl_dataset_t *ds, dmu_objset_type_t type, objset_t **osp)
+dmu_objset_own(const char *name, dmu_objset_type_t type,
+ boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp)
{
- objset_t *os;
+ dsl_pool_t *dp;
+ dsl_dataset_t *ds;
int err;
+ ds_hold_flags_t flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0;
- os = kmem_alloc(sizeof (objset_t), KM_SLEEP);
- err = dmu_objset_open_ds_os(ds, os, type);
- if (err)
- kmem_free(os, sizeof (objset_t));
- else
- *osp = os;
- return (err);
+ err = dsl_pool_hold(name, FTAG, &dp);
+ if (err != 0)
+ return (err);
+ err = dsl_dataset_own(dp, name, flags, tag, &ds);
+ if (err != 0) {
+ dsl_pool_rele(dp, FTAG);
+ return (err);
+ }
+ err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp);
+ if (err != 0) {
+ dsl_dataset_disown(ds, flags, tag);
+ dsl_pool_rele(dp, FTAG);
+ return (err);
+ }
+
+ /* user accounting requires the dataset to be decrypted */
+ if (dmu_objset_userobjspace_upgradable(*osp) &&
+ (ds->ds_dir->dd_crypto_obj == 0 || decrypt))
+ dmu_objset_userobjspace_upgrade(*osp);
+
+ dsl_pool_rele(dp, FTAG);
+ return (0);
}
-/* called from zpl */
int
-dmu_objset_open(const char *name, dmu_objset_type_t type, int mode,
- objset_t **osp)
+dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type,
+ boolean_t readonly, boolean_t decrypt, void *tag, objset_t **osp)
{
- objset_t *os;
dsl_dataset_t *ds;
int err;
+ ds_hold_flags_t flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0;
- ASSERT(DS_MODE_TYPE(mode) == DS_MODE_USER ||
- DS_MODE_TYPE(mode) == DS_MODE_OWNER);
+ err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds);
+ if (err != 0)
+ return (err);
- os = kmem_alloc(sizeof (objset_t), KM_SLEEP);
- if (DS_MODE_TYPE(mode) == DS_MODE_USER)
- err = dsl_dataset_hold(name, os, &ds);
- else
- err = dsl_dataset_own(name, mode, os, &ds);
- if (err) {
- kmem_free(os, sizeof (objset_t));
+ err = dmu_objset_own_impl(ds, type, readonly, decrypt, tag, osp);
+ if (err != 0) {
+ dsl_dataset_disown(ds, flags, tag);
return (err);
}
- err = dmu_objset_open_ds_os(ds, os, type);
- if (err) {
- if (DS_MODE_TYPE(mode) == DS_MODE_USER)
- dsl_dataset_rele(ds, os);
- else
- dsl_dataset_disown(ds, os);
- kmem_free(os, sizeof (objset_t));
- } else {
- os->os_mode = mode;
- *osp = os;
- }
- return (err);
+ return (0);
}
void
-dmu_objset_close(objset_t *os)
+dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, void *tag)
{
- ASSERT(DS_MODE_TYPE(os->os_mode) == DS_MODE_USER ||
- DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER ||
- DS_MODE_TYPE(os->os_mode) == DS_MODE_NOHOLD);
+ ds_hold_flags_t flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0;
- if (DS_MODE_TYPE(os->os_mode) == DS_MODE_USER)
- dsl_dataset_rele(os->os->os_dsl_dataset, os);
- else if (DS_MODE_TYPE(os->os_mode) == DS_MODE_OWNER)
- dsl_dataset_disown(os->os->os_dsl_dataset, os);
- kmem_free(os, sizeof (objset_t));
+ dsl_pool_t *dp = dmu_objset_pool(os);
+ dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag);
+ dsl_pool_rele(dp, tag);
}
-int
+void
+dmu_objset_rele(objset_t *os, void *tag)
+{
+ dmu_objset_rele_flags(os, B_FALSE, tag);
+}
+
+/*
+ * When we are called, os MUST refer to an objset associated with a dataset
+ * that is owned by 'tag'; that is, is held and long held by 'tag' and ds_owner
+ * == tag. We will then release and reacquire ownership of the dataset while
+ * holding the pool config_rwlock to avoid intervening namespace or ownership
+ * changes may occur.
+ *
+ * This exists solely to accommodate zfs_ioc_userspace_upgrade()'s desire to
+ * release the hold on its dataset and acquire a new one on the dataset of the
+ * same name so that it can be partially torn down and reconstructed.
+ */
+void
+dmu_objset_refresh_ownership(objset_t *os, boolean_t decrypt, void *tag)
+{
+ dsl_pool_t *dp;
+ dsl_dataset_t *ds, *newds;
+ char name[ZFS_MAX_DATASET_NAME_LEN];
+
+ ds = os->os_dsl_dataset;
+ VERIFY3P(ds, !=, NULL);
+ VERIFY3P(ds->ds_owner, ==, tag);
+ VERIFY(dsl_dataset_long_held(ds));
+
+ dsl_dataset_name(ds, name);
+ dp = dmu_objset_pool(os);
+ dsl_pool_config_enter(dp, FTAG);
+ dmu_objset_disown(os, decrypt, tag);
+ VERIFY0(dsl_dataset_own(dp, name,
+ (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0, tag, &newds));
+ VERIFY3P(newds, ==, os->os_dsl_dataset);
+ dsl_pool_config_exit(dp, FTAG);
+}
+
+void
+dmu_objset_disown(objset_t *os, boolean_t decrypt, void *tag)
+{
+ /*
+ * Stop upgrading thread
+ */
+ dmu_objset_upgrade_stop(os);
+ dsl_dataset_disown(os->os_dsl_dataset,
+ (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0, tag);
+}
+
+void
dmu_objset_evict_dbufs(objset_t *os)
{
- objset_impl_t *osi = os->os;
+ dnode_t *dn_marker;
dnode_t *dn;
- mutex_enter(&osi->os_lock);
+ dn_marker = kmem_alloc(sizeof (dnode_t), KM_SLEEP);
+
+ mutex_enter(&os->os_lock);
+ dn = list_head(&os->os_dnodes);
+ while (dn != NULL) {
+ /*
+ * Skip dnodes without holds. We have to do this dance
+ * because dnode_add_ref() only works if there is already a
+ * hold. If the dnode has no holds, then it has no dbufs.
+ */
+ if (dnode_add_ref(dn, FTAG)) {
+ list_insert_after(&os->os_dnodes, dn, dn_marker);
+ mutex_exit(&os->os_lock);
+
+ dnode_evict_dbufs(dn);
+ dnode_rele(dn, FTAG);
+
+ mutex_enter(&os->os_lock);
+ dn = list_next(&os->os_dnodes, dn_marker);
+ list_remove(&os->os_dnodes, dn_marker);
+ } else {
+ dn = list_next(&os->os_dnodes, dn);
+ }
+ }
+ mutex_exit(&os->os_lock);
- /* process the mdn last, since the other dnodes have holds on it */
- list_remove(&osi->os_dnodes, osi->os_meta_dnode);
- list_insert_tail(&osi->os_dnodes, osi->os_meta_dnode);
+ kmem_free(dn_marker, sizeof (dnode_t));
- /*
- * Find the first dnode with holds. We have to do this dance
- * because dnode_add_ref() only works if you already have a
- * hold. If there are no holds then it has no dbufs so OK to
- * skip.
- */
- for (dn = list_head(&osi->os_dnodes);
- dn && !dnode_add_ref(dn, FTAG);
- dn = list_next(&osi->os_dnodes, dn))
- continue;
+ if (DMU_USERUSED_DNODE(os) != NULL) {
+ dnode_evict_dbufs(DMU_GROUPUSED_DNODE(os));
+ dnode_evict_dbufs(DMU_USERUSED_DNODE(os));
+ }
+ dnode_evict_dbufs(DMU_META_DNODE(os));
+}
+
+/*
+ * Objset eviction processing is split into into two pieces.
+ * The first marks the objset as evicting, evicts any dbufs that
+ * have a refcount of zero, and then queues up the objset for the
+ * second phase of eviction. Once os->os_dnodes has been cleared by
+ * dnode_buf_pageout()->dnode_destroy(), the second phase is executed.
+ * The second phase closes the special dnodes, dequeues the objset from
+ * the list of those undergoing eviction, and finally frees the objset.
+ *
+ * NOTE: Due to asynchronous eviction processing (invocation of
+ * dnode_buf_pageout()), it is possible for the meta dnode for the
+ * objset to have no holds even though os->os_dnodes is not empty.
+ */
+void
+dmu_objset_evict(objset_t *os)
+{
+ dsl_dataset_t *ds = os->os_dsl_dataset;
- while (dn) {
- dnode_t *next_dn = dn;
+ for (int t = 0; t < TXG_SIZE; t++)
+ ASSERT(!dmu_objset_is_dirty(os, t));
- do {
- next_dn = list_next(&osi->os_dnodes, next_dn);
- } while (next_dn && !dnode_add_ref(next_dn, FTAG));
+ if (ds)
+ dsl_prop_unregister_all(ds, os);
+
+ if (os->os_sa)
+ sa_tear_down(os);
- mutex_exit(&osi->os_lock);
- dnode_evict_dbufs(dn);
- dnode_rele(dn, FTAG);
- mutex_enter(&osi->os_lock);
- dn = next_dn;
+ dmu_objset_evict_dbufs(os);
+
+ mutex_enter(&os->os_lock);
+ spa_evicting_os_register(os->os_spa, os);
+ if (list_is_empty(&os->os_dnodes)) {
+ mutex_exit(&os->os_lock);
+ dmu_objset_evict_done(os);
+ } else {
+ mutex_exit(&os->os_lock);
}
- mutex_exit(&osi->os_lock);
- return (list_head(&osi->os_dnodes) != osi->os_meta_dnode);
+
+
}
void
-dmu_objset_evict(dsl_dataset_t *ds, void *arg)
+dmu_objset_evict_done(objset_t *os)
{
- objset_impl_t *osi = arg;
- objset_t os;
- int i;
+ ASSERT3P(list_head(&os->os_dnodes), ==, NULL);
- for (i = 0; i < TXG_SIZE; i++) {
- ASSERT(list_head(&osi->os_dirty_dnodes[i]) == NULL);
- ASSERT(list_head(&osi->os_free_dnodes[i]) == NULL);
- }
-
- if (ds) {
- if (!dsl_dataset_is_snapshot(ds)) {
- VERIFY(0 == dsl_prop_unregister(ds, "checksum",
- checksum_changed_cb, osi));
- VERIFY(0 == dsl_prop_unregister(ds, "compression",
- compression_changed_cb, osi));
- VERIFY(0 == dsl_prop_unregister(ds, "copies",
- copies_changed_cb, osi));
- }
- VERIFY(0 == dsl_prop_unregister(ds, "primarycache",
- primary_cache_changed_cb, osi));
- VERIFY(0 == dsl_prop_unregister(ds, "secondarycache",
- secondary_cache_changed_cb, osi));
+ dnode_special_close(&os->os_meta_dnode);
+ if (DMU_USERUSED_DNODE(os)) {
+ dnode_special_close(&os->os_userused_dnode);
+ dnode_special_close(&os->os_groupused_dnode);
}
+ zil_free(os->os_zil);
+
+ arc_buf_destroy(os->os_phys_buf, &os->os_phys_buf);
/*
- * We should need only a single pass over the dnode list, since
- * nothing can be added to the list at this point.
+ * This is a barrier to prevent the objset from going away in
+ * dnode_move() until we can safely ensure that the objset is still in
+ * use. We consider the objset valid before the barrier and invalid
+ * after the barrier.
*/
- os.os = osi;
- (void) dmu_objset_evict_dbufs(&os);
-
- ASSERT3P(list_head(&osi->os_dnodes), ==, osi->os_meta_dnode);
- ASSERT3P(list_tail(&osi->os_dnodes), ==, osi->os_meta_dnode);
- ASSERT3P(list_head(&osi->os_meta_dnode->dn_dbufs), ==, NULL);
-
- dnode_special_close(osi->os_meta_dnode);
- zil_free(osi->os_zil);
+ rw_enter(&os_lock, RW_READER);
+ rw_exit(&os_lock);
+
+ kmem_free(os->os_obj_next_percpu,
+ os->os_obj_next_percpu_len * sizeof (os->os_obj_next_percpu[0]));
+
+ mutex_destroy(&os->os_lock);
+ mutex_destroy(&os->os_userused_lock);
+ mutex_destroy(&os->os_obj_lock);
+ mutex_destroy(&os->os_user_ptr_lock);
+ mutex_destroy(&os->os_upgrade_lock);
+ for (int i = 0; i < TXG_SIZE; i++) {
+ multilist_destroy(os->os_dirty_dnodes[i]);
+ }
+ spa_evicting_os_deregister(os->os_spa, os);
+ kmem_free(os, sizeof (objset_t));
+}
- VERIFY(arc_buf_remove_ref(osi->os_phys_buf, &osi->os_phys_buf) == 1);
- mutex_destroy(&osi->os_lock);
- mutex_destroy(&osi->os_obj_lock);
- mutex_destroy(&osi->os_user_ptr_lock);
- kmem_free(osi, sizeof (objset_impl_t));
+timestruc_t
+dmu_objset_snap_cmtime(objset_t *os)
+{
+ return (dsl_dir_snap_cmtime(os->os_dsl_dataset->ds_dir));
}
-/* called from dsl for meta-objset */
-objset_impl_t *
-dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
- dmu_objset_type_t type, dmu_tx_t *tx)
+objset_t *
+dmu_objset_create_impl_dnstats(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
+ dmu_objset_type_t type, int levels, int blksz, int ibs, dmu_tx_t *tx)
{
- objset_impl_t *osi;
+ objset_t *os;
dnode_t *mdn;
ASSERT(dmu_tx_is_syncing(tx));
- if (ds)
- mutex_enter(&ds->ds_opening_lock);
- VERIFY(0 == dmu_objset_open_impl(spa, ds, bp, &osi));
- if (ds)
- mutex_exit(&ds->ds_opening_lock);
- mdn = osi->os_meta_dnode;
- dnode_allocate(mdn, DMU_OT_DNODE, 1 << DNODE_BLOCK_SHIFT,
- DN_MAX_INDBLKSHIFT, DMU_OT_NONE, 0, tx);
+ if (blksz == 0)
+ blksz = DNODE_BLOCK_SIZE;
+ if (ibs == 0)
+ ibs = DN_MAX_INDBLKSHIFT;
- /*
- * We don't want to have to increase the meta-dnode's nlevels
- * later, because then we could do it in quescing context while
+ if (ds != NULL)
+ VERIFY0(dmu_objset_from_ds(ds, &os));
+ else
+ VERIFY0(dmu_objset_open_impl(spa, NULL, bp, &os));
+
+ mdn = DMU_META_DNODE(os);
+
+ dnode_allocate(mdn, DMU_OT_DNODE, blksz, ibs, DMU_OT_NONE, 0,
+ DNODE_MIN_SLOTS, tx);
+
+ /*
+ * We don't want to have to increase the meta-dnode's nlevels
+ * later, because then we could do it in quescing context while
* we are also accessing it in open context.
*
* This precaution is not necessary for the MOS (ds == NULL),
* to convergence, so minimizing its dn_nlevels matters.
*/
if (ds != NULL) {
- int levels = 1;
-
- /*
- * Determine the number of levels necessary for the meta-dnode
- * to contain DN_MAX_OBJECT dnodes.
- */
- while ((uint64_t)mdn->dn_nblkptr << (mdn->dn_datablkshift +
- (levels - 1) * (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
- DN_MAX_OBJECT * sizeof (dnode_phys_t))
- levels++;
+ if (levels == 0) {
+ levels = 1;
+
+ /*
+ * Determine the number of levels necessary for the
+ * meta-dnode to contain DN_MAX_OBJECT dnodes. Note
+ * that in order to ensure that we do not overflow
+ * 64 bits, there has to be a nlevels that gives us a
+ * number of blocks > DN_MAX_OBJECT but < 2^64.
+ * Therefore, (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)
+ * (10) must be less than (64 - log2(DN_MAX_OBJECT))
+ * (16).
+ */
+ while ((uint64_t)mdn->dn_nblkptr <<
+ (mdn->dn_datablkshift - DNODE_SHIFT + (levels - 1) *
+ (mdn->dn_indblkshift - SPA_BLKPTRSHIFT)) <
+ DN_MAX_OBJECT)
+ levels++;
+ }
mdn->dn_next_nlevels[tx->tx_txg & TXG_MASK] =
mdn->dn_nlevels = levels;
ASSERT(type != DMU_OST_NONE);
ASSERT(type != DMU_OST_ANY);
ASSERT(type < DMU_OST_NUMTYPES);
- osi->os_phys->os_type = type;
+ os->os_phys->os_type = type;
+
+ /*
+ * Enable user accounting if it is enabled and this is not an
+ * encrypted receive.
+ */
+ if (dmu_objset_userused_enabled(os) &&
+ (!os->os_encrypted || !dmu_objset_is_receiving(os))) {
+ os->os_phys->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
+ if (dmu_objset_userobjused_enabled(os)) {
+ ds->ds_feature_activation_needed[
+ SPA_FEATURE_USEROBJ_ACCOUNTING] = B_TRUE;
+ os->os_phys->os_flags |=
+ OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE;
+ }
+ os->os_flags = os->os_phys->os_flags;
+ }
dsl_dataset_dirty(ds, tx);
- return (osi);
+ return (os);
}
-struct oscarg {
- void (*userfunc)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
- void *userarg;
- dsl_dataset_t *clone_parent;
- const char *lastname;
- dmu_objset_type_t type;
- uint64_t flags;
-};
+/* called from dsl for meta-objset */
+objset_t *
+dmu_objset_create_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *bp,
+ dmu_objset_type_t type, dmu_tx_t *tx)
+{
+ return (dmu_objset_create_impl_dnstats(spa, ds, bp, type, 0, 0, 0, tx));
+}
+
+typedef struct dmu_objset_create_arg {
+ const char *doca_name;
+ cred_t *doca_cred;
+ void (*doca_userfunc)(objset_t *os, void *arg,
+ cred_t *cr, dmu_tx_t *tx);
+ void *doca_userarg;
+ dmu_objset_type_t doca_type;
+ uint64_t doca_flags;
+ dsl_crypto_params_t *doca_dcp;
+} dmu_objset_create_arg_t;
/*ARGSUSED*/
static int
-dmu_objset_create_check(void *arg1, void *arg2, dmu_tx_t *tx)
+dmu_objset_create_check(void *arg, dmu_tx_t *tx)
{
- dsl_dir_t *dd = arg1;
- struct oscarg *oa = arg2;
- objset_t *mos = dd->dd_pool->dp_meta_objset;
- int err;
- uint64_t ddobj;
+ dmu_objset_create_arg_t *doca = arg;
+ dsl_pool_t *dp = dmu_tx_pool(tx);
+ dsl_dir_t *pdd;
+ const char *tail;
+ int error;
- err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
- oa->lastname, sizeof (uint64_t), 1, &ddobj);
- if (err != ENOENT)
- return (err ? err : EEXIST);
+ if (strchr(doca->doca_name, '@') != NULL)
+ return (SET_ERROR(EINVAL));
- if (oa->clone_parent != NULL) {
- /*
- * You can't clone across pools.
- */
- if (oa->clone_parent->ds_dir->dd_pool != dd->dd_pool)
- return (EXDEV);
+ if (strlen(doca->doca_name) >= ZFS_MAX_DATASET_NAME_LEN)
+ return (SET_ERROR(ENAMETOOLONG));
- /*
- * You can only clone snapshots, not the head datasets.
- */
- if (oa->clone_parent->ds_phys->ds_num_children == 0)
- return (EINVAL);
+ error = dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail);
+ if (error != 0)
+ return (error);
+ if (tail == NULL) {
+ dsl_dir_rele(pdd, FTAG);
+ return (SET_ERROR(EEXIST));
}
- return (0);
+ error = dmu_objset_create_crypt_check(pdd, doca->doca_dcp);
+ if (error != 0) {
+ dsl_dir_rele(pdd, FTAG);
+ return (error);
+ }
+
+ error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
+ doca->doca_cred);
+
+ dsl_dir_rele(pdd, FTAG);
+
+ return (error);
}
static void
-dmu_objset_create_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
+dmu_objset_create_sync(void *arg, dmu_tx_t *tx)
{
- dsl_dir_t *dd = arg1;
- struct oscarg *oa = arg2;
+ dmu_objset_create_arg_t *doca = arg;
+ dsl_pool_t *dp = dmu_tx_pool(tx);
+ dsl_dir_t *pdd;
+ const char *tail;
dsl_dataset_t *ds;
+ uint64_t obj;
blkptr_t *bp;
- uint64_t dsobj;
+ objset_t *os;
+ zio_t *rzio;
- ASSERT(dmu_tx_is_syncing(tx));
+ VERIFY0(dsl_dir_hold(dp, doca->doca_name, FTAG, &pdd, &tail));
- dsobj = dsl_dataset_create_sync(dd, oa->lastname,
- oa->clone_parent, oa->flags, cr, tx);
+ obj = dsl_dataset_create_sync(pdd, tail, NULL, doca->doca_flags,
+ doca->doca_cred, doca->doca_dcp, tx);
- VERIFY(0 == dsl_dataset_hold_obj(dd->dd_pool, dsobj, FTAG, &ds));
+ VERIFY0(dsl_dataset_hold_obj_flags(pdd->dd_pool, obj,
+ DS_HOLD_FLAG_DECRYPT, FTAG, &ds));
+ rrw_enter(&ds->ds_bp_rwlock, RW_READER, FTAG);
bp = dsl_dataset_get_blkptr(ds);
- if (BP_IS_HOLE(bp)) {
- objset_impl_t *osi;
-
- /* This is an empty dmu_objset; not a clone. */
- osi = dmu_objset_create_impl(dsl_dataset_get_spa(ds),
- ds, bp, oa->type, tx);
+ os = dmu_objset_create_impl(pdd->dd_pool->dp_spa,
+ ds, bp, doca->doca_type, tx);
+ rrw_exit(&ds->ds_bp_rwlock, FTAG);
- if (oa->userfunc)
- oa->userfunc(&osi->os, oa->userarg, cr, tx);
+ if (doca->doca_userfunc != NULL) {
+ doca->doca_userfunc(os, doca->doca_userarg,
+ doca->doca_cred, tx);
}
- spa_history_internal_log(LOG_DS_CREATE, dd->dd_pool->dp_spa,
- tx, cr, "dataset = %llu", dsobj);
+ /*
+ * The doca_userfunc() may write out some data that needs to be
+ * encrypted if the dataset is encrypted (specifically the root
+ * directory). This data must be written out before the encryption
+ * key mapping is removed by dsl_dataset_rele_flags(). Force the
+ * I/O to occur immediately by invoking the relevant sections of
+ * dsl_pool_sync().
+ */
+ if (os->os_encrypted) {
+ dsl_dataset_t *tmpds = NULL;
+ boolean_t need_sync_done = B_FALSE;
+
+ mutex_enter(&ds->ds_lock);
+ ds->ds_owner = FTAG;
+ mutex_exit(&ds->ds_lock);
+
+ rzio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
+ tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds,
+ tx->tx_txg);
+ if (tmpds != NULL) {
+ dsl_dataset_sync(ds, rzio, tx);
+ need_sync_done = B_TRUE;
+ }
+ VERIFY0(zio_wait(rzio));
- dsl_dataset_rele(ds, FTAG);
-}
+ dmu_objset_do_userquota_updates(os, tx);
+ taskq_wait(dp->dp_sync_taskq);
-int
-dmu_objset_create(const char *name, dmu_objset_type_t type,
- objset_t *clone_parent, uint64_t flags,
- void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg)
-{
- dsl_dir_t *pdd;
- const char *tail;
- int err = 0;
- struct oscarg oa = { 0 };
+ rzio = zio_root(dp->dp_spa, NULL, NULL, ZIO_FLAG_MUSTSUCCEED);
+ tmpds = txg_list_remove_this(&dp->dp_dirty_datasets, ds,
+ tx->tx_txg);
+ if (tmpds != NULL) {
+ dmu_buf_rele(ds->ds_dbuf, ds);
+ dsl_dataset_sync(ds, rzio, tx);
+ }
+ VERIFY0(zio_wait(rzio));
- ASSERT(strchr(name, '@') == NULL);
- err = dsl_dir_open(name, FTAG, &pdd, &tail);
- if (err)
- return (err);
- if (tail == NULL) {
- dsl_dir_close(pdd, FTAG);
- return (EEXIST);
- }
+ if (need_sync_done)
+ dsl_dataset_sync_done(ds, tx);
- dprintf("name=%s\n", name);
+ mutex_enter(&ds->ds_lock);
+ ds->ds_owner = NULL;
+ mutex_exit(&ds->ds_lock);
+ }
- oa.userfunc = func;
- oa.userarg = arg;
- oa.lastname = tail;
- oa.type = type;
- oa.flags = flags;
+ spa_history_log_internal_ds(ds, "create", tx, "");
+ zvol_create_minors(dp->dp_spa, doca->doca_name, B_TRUE);
- if (clone_parent != NULL) {
- /*
- * You can't clone to a different type.
- */
- if (clone_parent->os->os_phys->os_type != type) {
- dsl_dir_close(pdd, FTAG);
- return (EINVAL);
- }
- oa.clone_parent = clone_parent->os->os_dsl_dataset;
- }
- err = dsl_sync_task_do(pdd->dd_pool, dmu_objset_create_check,
- dmu_objset_create_sync, pdd, &oa, 5);
- dsl_dir_close(pdd, FTAG);
- return (err);
+ dsl_dataset_rele_flags(ds, DS_HOLD_FLAG_DECRYPT, FTAG);
+ dsl_dir_rele(pdd, FTAG);
}
int
-dmu_objset_destroy(const char *name)
+dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
+ dsl_crypto_params_t *dcp, dmu_objset_create_sync_func_t func, void *arg)
{
- objset_t *os;
- int error;
+ dmu_objset_create_arg_t doca;
+ dsl_crypto_params_t tmp_dcp = { 0 };
+
+ doca.doca_name = name;
+ doca.doca_cred = CRED();
+ doca.doca_flags = flags;
+ doca.doca_userfunc = func;
+ doca.doca_userarg = arg;
+ doca.doca_type = type;
/*
- * If it looks like we'll be able to destroy it, and there's
- * an unplayed replay log sitting around, destroy the log.
- * It would be nicer to do this in dsl_dataset_destroy_sync(),
- * but the replay log objset is modified in open context.
+ * Some callers (mostly for testing) do not provide a dcp on their
+ * own but various code inside the sync task will require it to be
+ * allocated. Rather than adding NULL checks throughout this code
+ * or adding dummy dcp's to all of the callers we simply create a
+ * dummy one here and use that. This zero dcp will have the same
+ * effect as asking for inheritence of all encryption params.
*/
- error = dmu_objset_open(name, DMU_OST_ANY,
- DS_MODE_OWNER|DS_MODE_READONLY|DS_MODE_INCONSISTENT, &os);
- if (error == 0) {
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
- zil_destroy(dmu_objset_zil(os), B_FALSE);
-
- error = dsl_dataset_destroy(ds, os);
- /*
- * dsl_dataset_destroy() closes the ds.
- */
- kmem_free(os, sizeof (objset_t));
- }
+ doca.doca_dcp = (dcp != NULL) ? dcp : &tmp_dcp;
- return (error);
+ return (dsl_sync_task(name,
+ dmu_objset_create_check, dmu_objset_create_sync, &doca,
+ 6, ZFS_SPACE_CHECK_NORMAL));
}
-/*
- * This will close the objset.
- */
-int
-dmu_objset_rollback(objset_t *os)
+typedef struct dmu_objset_clone_arg {
+ const char *doca_clone;
+ const char *doca_origin;
+ cred_t *doca_cred;
+} dmu_objset_clone_arg_t;
+
+/*ARGSUSED*/
+static int
+dmu_objset_clone_check(void *arg, dmu_tx_t *tx)
{
- int err;
- dsl_dataset_t *ds;
+ dmu_objset_clone_arg_t *doca = arg;
+ dsl_dir_t *pdd;
+ const char *tail;
+ int error;
+ dsl_dataset_t *origin;
+ dsl_pool_t *dp = dmu_tx_pool(tx);
+
+ if (strchr(doca->doca_clone, '@') != NULL)
+ return (SET_ERROR(EINVAL));
- ds = os->os->os_dsl_dataset;
+ if (strlen(doca->doca_clone) >= ZFS_MAX_DATASET_NAME_LEN)
+ return (SET_ERROR(ENAMETOOLONG));
- if (!dsl_dataset_tryown(ds, TRUE, os)) {
- dmu_objset_close(os);
- return (EBUSY);
+ error = dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail);
+ if (error != 0)
+ return (error);
+ if (tail == NULL) {
+ dsl_dir_rele(pdd, FTAG);
+ return (SET_ERROR(EEXIST));
}
- err = dsl_dataset_rollback(ds, os->os->os_phys->os_type);
+ error = dsl_fs_ss_limit_check(pdd, 1, ZFS_PROP_FILESYSTEM_LIMIT, NULL,
+ doca->doca_cred);
+ if (error != 0) {
+ dsl_dir_rele(pdd, FTAG);
+ return (SET_ERROR(EDQUOT));
+ }
- /*
- * NB: we close the objset manually because the rollback
- * actually implicitly called dmu_objset_evict(), thus freeing
- * the objset_impl_t.
- */
- dsl_dataset_disown(ds, os);
- kmem_free(os, sizeof (objset_t));
- return (err);
-}
+ error = dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin);
+ if (error != 0) {
+ dsl_dir_rele(pdd, FTAG);
+ return (error);
+ }
-struct snaparg {
- dsl_sync_task_group_t *dstg;
- char *snapname;
- char failed[MAXPATHLEN];
- boolean_t checkperms;
- list_t objsets;
-};
+ /* You can only clone snapshots, not the head datasets. */
+ if (!origin->ds_is_snapshot) {
+ dsl_dataset_rele(origin, FTAG);
+ dsl_dir_rele(pdd, FTAG);
+ return (SET_ERROR(EINVAL));
+ }
-struct osnode {
- list_node_t node;
- objset_t *os;
-};
+ error = dmu_objset_clone_crypt_check(pdd, origin->ds_dir);
+ if (error != 0) {
+ dsl_dataset_rele(origin, FTAG);
+ dsl_dir_rele(pdd, FTAG);
+ return (error);
+ }
-static int
-dmu_objset_snapshot_one(char *name, void *arg)
+ dsl_dataset_rele(origin, FTAG);
+ dsl_dir_rele(pdd, FTAG);
+
+ return (0);
+}
+
+static void
+dmu_objset_clone_sync(void *arg, dmu_tx_t *tx)
{
- struct snaparg *sn = arg;
- objset_t *os;
- int err;
+ dmu_objset_clone_arg_t *doca = arg;
+ dsl_pool_t *dp = dmu_tx_pool(tx);
+ dsl_dir_t *pdd;
+ const char *tail;
+ dsl_dataset_t *origin, *ds;
+ uint64_t obj;
+ char namebuf[ZFS_MAX_DATASET_NAME_LEN];
- (void) strcpy(sn->failed, name);
+ VERIFY0(dsl_dir_hold(dp, doca->doca_clone, FTAG, &pdd, &tail));
+ VERIFY0(dsl_dataset_hold(dp, doca->doca_origin, FTAG, &origin));
- /*
- * Check permissions only when requested. This only applies when
- * doing a recursive snapshot. The permission checks for the starting
- * dataset have already been performed in zfs_secpolicy_snapshot()
- */
- if (sn->checkperms == B_TRUE &&
- (err = zfs_secpolicy_snapshot_perms(name, CRED())))
- return (err);
+ obj = dsl_dataset_create_sync(pdd, tail, origin, 0,
+ doca->doca_cred, NULL, tx);
- err = dmu_objset_open(name, DMU_OST_ANY, DS_MODE_USER, &os);
- if (err != 0)
- return (err);
+ VERIFY0(dsl_dataset_hold_obj(pdd->dd_pool, obj, FTAG, &ds));
+ dsl_dataset_name(origin, namebuf);
+ spa_history_log_internal_ds(ds, "clone", tx,
+ "origin=%s (%llu)", namebuf, origin->ds_object);
+ zvol_create_minors(dp->dp_spa, doca->doca_clone, B_TRUE);
+ dsl_dataset_rele(ds, FTAG);
+ dsl_dataset_rele(origin, FTAG);
+ dsl_dir_rele(pdd, FTAG);
+}
- /* If the objset is in an inconsistent state, return busy */
- if (os->os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) {
- dmu_objset_close(os);
- return (EBUSY);
- }
+int
+dmu_objset_clone(const char *clone, const char *origin)
+{
+ dmu_objset_clone_arg_t doca;
- /*
- * NB: we need to wait for all in-flight changes to get to disk,
- * so that we snapshot those changes. zil_suspend does this as
- * a side effect.
- */
- err = zil_suspend(dmu_objset_zil(os));
- if (err == 0) {
- struct osnode *osn;
- dsl_sync_task_create(sn->dstg, dsl_dataset_snapshot_check,
- dsl_dataset_snapshot_sync, os->os->os_dsl_dataset,
- sn->snapname, 3);
- osn = kmem_alloc(sizeof (struct osnode), KM_SLEEP);
- osn->os = os;
- list_insert_tail(&sn->objsets, osn);
- } else {
- dmu_objset_close(os);
- }
+ doca.doca_clone = clone;
+ doca.doca_origin = origin;
+ doca.doca_cred = CRED();
- return (err);
+ return (dsl_sync_task(clone,
+ dmu_objset_clone_check, dmu_objset_clone_sync, &doca,
+ 6, ZFS_SPACE_CHECK_NORMAL));
}
int
-dmu_objset_snapshot(char *fsname, char *snapname, boolean_t recursive)
+dmu_objset_snapshot_one(const char *fsname, const char *snapname)
{
- dsl_sync_task_t *dst;
- struct osnode *osn;
- struct snaparg sn = { 0 };
- spa_t *spa;
int err;
+ char *longsnap = kmem_asprintf("%s@%s", fsname, snapname);
+ nvlist_t *snaps = fnvlist_alloc();
- (void) strcpy(sn.failed, fsname);
+ fnvlist_add_boolean(snaps, longsnap);
+ strfree(longsnap);
+ err = dsl_dataset_snapshot(snaps, NULL, NULL);
+ fnvlist_free(snaps);
+ return (err);
+}
- err = spa_open(fsname, &spa, FTAG);
- if (err)
- return (err);
+static void
+dmu_objset_upgrade_task_cb(void *data)
+{
+ objset_t *os = data;
- sn.dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
- sn.snapname = snapname;
- list_create(&sn.objsets, sizeof (struct osnode),
- offsetof(struct osnode, node));
+ mutex_enter(&os->os_upgrade_lock);
+ os->os_upgrade_status = EINTR;
+ if (!os->os_upgrade_exit) {
+ mutex_exit(&os->os_upgrade_lock);
- if (recursive) {
- sn.checkperms = B_TRUE;
- err = dmu_objset_find(fsname,
- dmu_objset_snapshot_one, &sn, DS_FIND_CHILDREN);
- } else {
- sn.checkperms = B_FALSE;
- err = dmu_objset_snapshot_one(fsname, &sn);
+ os->os_upgrade_status = os->os_upgrade_cb(os);
+ mutex_enter(&os->os_upgrade_lock);
}
+ os->os_upgrade_exit = B_TRUE;
+ os->os_upgrade_id = 0;
+ mutex_exit(&os->os_upgrade_lock);
+ dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
+}
- if (err)
- goto out;
+static void
+dmu_objset_upgrade(objset_t *os, dmu_objset_upgrade_cb_t cb)
+{
+ if (os->os_upgrade_id != 0)
+ return;
+
+ ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
+ dsl_dataset_long_hold(dmu_objset_ds(os), upgrade_tag);
+
+ mutex_enter(&os->os_upgrade_lock);
+ if (os->os_upgrade_id == 0 && os->os_upgrade_status == 0) {
+ os->os_upgrade_exit = B_FALSE;
+ os->os_upgrade_cb = cb;
+ os->os_upgrade_id = taskq_dispatch(
+ os->os_spa->spa_upgrade_taskq,
+ dmu_objset_upgrade_task_cb, os, TQ_SLEEP);
+ if (os->os_upgrade_id == TASKQID_INVALID) {
+ dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
+ os->os_upgrade_status = ENOMEM;
+ }
+ }
+ mutex_exit(&os->os_upgrade_lock);
+}
- err = dsl_sync_task_group_wait(sn.dstg);
+static void
+dmu_objset_upgrade_stop(objset_t *os)
+{
+ mutex_enter(&os->os_upgrade_lock);
+ os->os_upgrade_exit = B_TRUE;
+ if (os->os_upgrade_id != 0) {
+ taskqid_t id = os->os_upgrade_id;
- for (dst = list_head(&sn.dstg->dstg_tasks); dst;
- dst = list_next(&sn.dstg->dstg_tasks, dst)) {
- dsl_dataset_t *ds = dst->dst_arg1;
- if (dst->dst_err)
- dsl_dataset_name(ds, sn.failed);
- }
+ os->os_upgrade_id = 0;
+ mutex_exit(&os->os_upgrade_lock);
-out:
- while (osn = list_head(&sn.objsets)) {
- list_remove(&sn.objsets, osn);
- zil_resume(dmu_objset_zil(osn->os));
- dmu_objset_close(osn->os);
- kmem_free(osn, sizeof (struct osnode));
+ if ((taskq_cancel_id(os->os_spa->spa_upgrade_taskq, id)) == 0) {
+ dsl_dataset_long_rele(dmu_objset_ds(os), upgrade_tag);
+ }
+ txg_wait_synced(os->os_spa->spa_dsl_pool, 0);
+ } else {
+ mutex_exit(&os->os_upgrade_lock);
}
- list_destroy(&sn.objsets);
-
- if (err)
- (void) strcpy(fsname, sn.failed);
- dsl_sync_task_group_destroy(sn.dstg);
- spa_close(spa, FTAG);
- return (err);
}
static void
-dmu_objset_sync_dnodes(list_t *list, dmu_tx_t *tx)
+dmu_objset_sync_dnodes(multilist_sublist_t *list, dmu_tx_t *tx)
{
dnode_t *dn;
- while (dn = list_head(list)) {
+ while ((dn = multilist_sublist_head(list)) != NULL) {
ASSERT(dn->dn_object != DMU_META_DNODE_OBJECT);
ASSERT(dn->dn_dbuf->db_data_pending);
/*
- * Initialize dn_zio outside dnode_sync()
- * to accomodate meta-dnode
+ * Initialize dn_zio outside dnode_sync() because the
+ * meta-dnode needs to set it ouside dnode_sync().
*/
dn->dn_zio = dn->dn_dbuf->db_data_pending->dr_zio;
ASSERT(dn->dn_zio);
ASSERT3U(dn->dn_nlevels, <=, DN_MAX_LEVELS);
- list_remove(list, dn);
+ multilist_sublist_remove(list, dn);
+
+ multilist_t *newlist = dn->dn_objset->os_synced_dnodes;
+ if (newlist != NULL) {
+ (void) dnode_add_ref(dn, newlist);
+ multilist_insert(newlist, dn);
+ }
+
dnode_sync(dn, tx);
}
}
/* ARGSUSED */
static void
-ready(zio_t *zio, arc_buf_t *abuf, void *arg)
+dmu_objset_write_ready(zio_t *zio, arc_buf_t *abuf, void *arg)
{
blkptr_t *bp = zio->io_bp;
- blkptr_t *bp_orig = &zio->io_bp_orig;
- objset_impl_t *os = arg;
+ objset_t *os = arg;
dnode_phys_t *dnp = &os->os_phys->os_meta_dnode;
+ uint64_t fill = 0;
- ASSERT(bp == os->os_rootbp);
- ASSERT(BP_GET_TYPE(bp) == DMU_OT_OBJSET);
- ASSERT(BP_GET_LEVEL(bp) == 0);
+ ASSERT(!BP_IS_EMBEDDED(bp));
+ ASSERT3U(BP_GET_TYPE(bp), ==, DMU_OT_OBJSET);
+ ASSERT0(BP_GET_LEVEL(bp));
/*
- * Update rootbp fill count.
+ * Update rootbp fill count: it should be the number of objects
+ * allocated in the object set (not counting the "special"
+ * objects that are stored in the objset_phys_t -- the meta
+ * dnode and user/group accounting objects).
*/
- bp->blk_fill = 1; /* count the meta-dnode */
for (int i = 0; i < dnp->dn_nblkptr; i++)
- bp->blk_fill += dnp->dn_blkptr[i].blk_fill;
+ fill += BP_GET_FILL(&dnp->dn_blkptr[i]);
+
+ BP_SET_FILL(bp, fill);
+
+ if (os->os_dsl_dataset != NULL)
+ rrw_enter(&os->os_dsl_dataset->ds_bp_rwlock, RW_WRITER, FTAG);
+ *os->os_rootbp = *bp;
+ if (os->os_dsl_dataset != NULL)
+ rrw_exit(&os->os_dsl_dataset->ds_bp_rwlock, FTAG);
+}
+
+/* ARGSUSED */
+static void
+dmu_objset_write_done(zio_t *zio, arc_buf_t *abuf, void *arg)
+{
+ blkptr_t *bp = zio->io_bp;
+ blkptr_t *bp_orig = &zio->io_bp_orig;
+ objset_t *os = arg;
if (zio->io_flags & ZIO_FLAG_IO_REWRITE) {
- ASSERT(DVA_EQUAL(BP_IDENTITY(bp), BP_IDENTITY(bp_orig)));
+ ASSERT(BP_EQUAL(bp, bp_orig));
} else {
- if (zio->io_bp_orig.blk_birth == os->os_synctx->tx_txg)
- (void) dsl_dataset_block_kill(os->os_dsl_dataset,
- &zio->io_bp_orig, zio, os->os_synctx);
- dsl_dataset_block_born(os->os_dsl_dataset, bp, os->os_synctx);
+ dsl_dataset_t *ds = os->os_dsl_dataset;
+ dmu_tx_t *tx = os->os_synctx;
+
+ (void) dsl_dataset_block_kill(ds, bp_orig, tx, B_TRUE);
+ dsl_dataset_block_born(ds, bp, tx);
}
+ kmem_free(bp, sizeof (*bp));
+}
+
+typedef struct sync_dnodes_arg {
+ multilist_t *sda_list;
+ int sda_sublist_idx;
+ multilist_t *sda_newlist;
+ dmu_tx_t *sda_tx;
+} sync_dnodes_arg_t;
+
+static void
+sync_dnodes_task(void *arg)
+{
+ sync_dnodes_arg_t *sda = arg;
+
+ multilist_sublist_t *ms =
+ multilist_sublist_lock(sda->sda_list, sda->sda_sublist_idx);
+
+ dmu_objset_sync_dnodes(ms, sda->sda_tx);
+
+ multilist_sublist_unlock(ms);
+
+ kmem_free(sda, sizeof (*sda));
}
+
/* called from dsl */
void
-dmu_objset_sync(objset_impl_t *os, zio_t *pio, dmu_tx_t *tx)
+dmu_objset_sync(objset_t *os, zio_t *pio, dmu_tx_t *tx)
{
int txgoff;
- zbookmark_t zb;
- writeprops_t wp = { 0 };
+ zbookmark_phys_t zb;
+ zio_prop_t zp;
zio_t *zio;
list_t *list;
dbuf_dirty_record_t *dr;
+ blkptr_t *blkptr_copy = kmem_alloc(sizeof (*os->os_rootbp), KM_SLEEP);
+ *blkptr_copy = *os->os_rootbp;
dprintf_ds(os->os_dsl_dataset, "txg=%llu\n", tx->tx_txg);
/*
* Create the root block IO
*/
- zb.zb_objset = os->os_dsl_dataset ? os->os_dsl_dataset->ds_object : 0;
- zb.zb_object = 0;
- zb.zb_level = -1; /* for block ordering; it's level 0 on disk */
- zb.zb_blkid = 0;
+ SET_BOOKMARK(&zb, os->os_dsl_dataset ?
+ os->os_dsl_dataset->ds_object : DMU_META_OBJSET,
+ ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
+ arc_release(os->os_phys_buf, &os->os_phys_buf);
- wp.wp_type = DMU_OT_OBJSET;
- wp.wp_level = 0; /* on-disk BP level; see above */
- wp.wp_copies = os->os_copies;
- wp.wp_oschecksum = os->os_checksum;
- wp.wp_oscompress = os->os_compress;
+ dmu_write_policy(os, NULL, 0, 0, &zp);
- if (BP_IS_OLDER(os->os_rootbp, tx->tx_txg)) {
- (void) dsl_dataset_block_kill(os->os_dsl_dataset,
- os->os_rootbp, pio, tx);
+ /*
+ * If we are either claiming the ZIL or doing a raw receive write out
+ * the os_phys_buf raw. Neither of these actions will effect the MAC
+ * at this point.
+ */
+ if (arc_is_unauthenticated(os->os_phys_buf) || os->os_next_write_raw) {
+ ASSERT(os->os_encrypted);
+ os->os_next_write_raw = B_FALSE;
+ arc_convert_to_raw(os->os_phys_buf,
+ os->os_dsl_dataset->ds_object, ZFS_HOST_BYTEORDER,
+ DMU_OT_OBJSET, NULL, NULL, NULL);
}
- arc_release(os->os_phys_buf, &os->os_phys_buf);
- zio = arc_write(pio, os->os_spa, &wp, DMU_OS_IS_L2CACHEABLE(os),
- tx->tx_txg, os->os_rootbp, os->os_phys_buf, ready, NULL, os,
- ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
+ zio = arc_write(pio, os->os_spa, tx->tx_txg,
+ blkptr_copy, os->os_phys_buf, DMU_OS_IS_L2CACHEABLE(os),
+ &zp, dmu_objset_write_ready, NULL, NULL, dmu_objset_write_done,
+ os, ZIO_PRIORITY_ASYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
/*
- * Sync meta-dnode - the parent IO for the sync is the root block
+ * Sync special dnodes - the parent IO for the sync is the root block
*/
- os->os_meta_dnode->dn_zio = zio;
- dnode_sync(os->os_meta_dnode, tx);
+ DMU_META_DNODE(os)->dn_zio = zio;
+ dnode_sync(DMU_META_DNODE(os), tx);
+
+ os->os_phys->os_flags = os->os_flags;
+
+ if (DMU_USERUSED_DNODE(os) &&
+ DMU_USERUSED_DNODE(os)->dn_type != DMU_OT_NONE) {
+ DMU_USERUSED_DNODE(os)->dn_zio = zio;
+ dnode_sync(DMU_USERUSED_DNODE(os), tx);
+ DMU_GROUPUSED_DNODE(os)->dn_zio = zio;
+ dnode_sync(DMU_GROUPUSED_DNODE(os), tx);
+ }
txgoff = tx->tx_txg & TXG_MASK;
- dmu_objset_sync_dnodes(&os->os_free_dnodes[txgoff], tx);
- dmu_objset_sync_dnodes(&os->os_dirty_dnodes[txgoff], tx);
+ if (dmu_objset_userused_enabled(os) &&
+ (!os->os_encrypted || !dmu_objset_is_receiving(os))) {
+ /*
+ * We must create the list here because it uses the
+ * dn_dirty_link[] of this txg. But it may already
+ * exist because we call dsl_dataset_sync() twice per txg.
+ */
+ if (os->os_synced_dnodes == NULL) {
+ os->os_synced_dnodes =
+ multilist_create(sizeof (dnode_t),
+ offsetof(dnode_t, dn_dirty_link[txgoff]),
+ dnode_multilist_index_func);
+ } else {
+ ASSERT3U(os->os_synced_dnodes->ml_offset, ==,
+ offsetof(dnode_t, dn_dirty_link[txgoff]));
+ }
+ }
+
+ for (int i = 0;
+ i < multilist_get_num_sublists(os->os_dirty_dnodes[txgoff]); i++) {
+ sync_dnodes_arg_t *sda = kmem_alloc(sizeof (*sda), KM_SLEEP);
+ sda->sda_list = os->os_dirty_dnodes[txgoff];
+ sda->sda_sublist_idx = i;
+ sda->sda_tx = tx;
+ (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
+ sync_dnodes_task, sda, 0);
+ /* callback frees sda */
+ }
+ taskq_wait(dmu_objset_pool(os)->dp_sync_taskq);
- list = &os->os_meta_dnode->dn_dirty_records[txgoff];
- while (dr = list_head(list)) {
- ASSERT(dr->dr_dbuf->db_level == 0);
+ list = &DMU_META_DNODE(os)->dn_dirty_records[txgoff];
+ while ((dr = list_head(list)) != NULL) {
+ ASSERT0(dr->dr_dbuf->db_level);
list_remove(list, dr);
if (dr->dr_zio)
zio_nowait(dr->dr_zio);
}
+
+ /* Enable dnode backfill if enough objects have been freed. */
+ if (os->os_freed_dnodes >= dmu_rescan_dnode_threshold) {
+ os->os_rescan_dnodes = B_TRUE;
+ os->os_freed_dnodes = 0;
+ }
+
/*
* Free intent log blocks up to this tx.
*/
zio_nowait(zio);
}
+boolean_t
+dmu_objset_is_dirty(objset_t *os, uint64_t txg)
+{
+ return (!multilist_is_empty(os->os_dirty_dnodes[txg & TXG_MASK]));
+}
+
+static objset_used_cb_t *used_cbs[DMU_OST_NUMTYPES];
+
+void
+dmu_objset_register_type(dmu_objset_type_t ost, objset_used_cb_t *cb)
+{
+ used_cbs[ost] = cb;
+}
+
+boolean_t
+dmu_objset_userused_enabled(objset_t *os)
+{
+ return (spa_version(os->os_spa) >= SPA_VERSION_USERSPACE &&
+ used_cbs[os->os_phys->os_type] != NULL &&
+ DMU_USERUSED_DNODE(os) != NULL);
+}
+
+boolean_t
+dmu_objset_userobjused_enabled(objset_t *os)
+{
+ return (dmu_objset_userused_enabled(os) &&
+ spa_feature_is_enabled(os->os_spa, SPA_FEATURE_USEROBJ_ACCOUNTING));
+}
+
+typedef struct userquota_node {
+ /* must be in the first filed, see userquota_update_cache() */
+ char uqn_id[20 + DMU_OBJACCT_PREFIX_LEN];
+ int64_t uqn_delta;
+ avl_node_t uqn_node;
+} userquota_node_t;
+
+typedef struct userquota_cache {
+ avl_tree_t uqc_user_deltas;
+ avl_tree_t uqc_group_deltas;
+} userquota_cache_t;
+
+static int
+userquota_compare(const void *l, const void *r)
+{
+ const userquota_node_t *luqn = l;
+ const userquota_node_t *ruqn = r;
+ int rv;
+
+ /*
+ * NB: can only access uqn_id because userquota_update_cache() doesn't
+ * pass in an entire userquota_node_t.
+ */
+ rv = strcmp(luqn->uqn_id, ruqn->uqn_id);
+
+ return (AVL_ISIGN(rv));
+}
+
+static void
+do_userquota_cacheflush(objset_t *os, userquota_cache_t *cache, dmu_tx_t *tx)
+{
+ void *cookie;
+ userquota_node_t *uqn;
+
+ ASSERT(dmu_tx_is_syncing(tx));
+
+ cookie = NULL;
+ while ((uqn = avl_destroy_nodes(&cache->uqc_user_deltas,
+ &cookie)) != NULL) {
+ /*
+ * os_userused_lock protects against concurrent calls to
+ * zap_increment_int(). It's needed because zap_increment_int()
+ * is not thread-safe (i.e. not atomic).
+ */
+ mutex_enter(&os->os_userused_lock);
+ VERIFY0(zap_increment(os, DMU_USERUSED_OBJECT,
+ uqn->uqn_id, uqn->uqn_delta, tx));
+ mutex_exit(&os->os_userused_lock);
+ kmem_free(uqn, sizeof (*uqn));
+ }
+ avl_destroy(&cache->uqc_user_deltas);
+
+ cookie = NULL;
+ while ((uqn = avl_destroy_nodes(&cache->uqc_group_deltas,
+ &cookie)) != NULL) {
+ mutex_enter(&os->os_userused_lock);
+ VERIFY0(zap_increment(os, DMU_GROUPUSED_OBJECT,
+ uqn->uqn_id, uqn->uqn_delta, tx));
+ mutex_exit(&os->os_userused_lock);
+ kmem_free(uqn, sizeof (*uqn));
+ }
+ avl_destroy(&cache->uqc_group_deltas);
+}
+
+static void
+userquota_update_cache(avl_tree_t *avl, const char *id, int64_t delta)
+{
+ userquota_node_t *uqn;
+ avl_index_t idx;
+
+ ASSERT(strlen(id) < sizeof (uqn->uqn_id));
+ /*
+ * Use id directly for searching because uqn_id is the first field of
+ * userquota_node_t and fields after uqn_id won't be accessed in
+ * avl_find().
+ */
+ uqn = avl_find(avl, (const void *)id, &idx);
+ if (uqn == NULL) {
+ uqn = kmem_zalloc(sizeof (*uqn), KM_SLEEP);
+ strlcpy(uqn->uqn_id, id, sizeof (uqn->uqn_id));
+ avl_insert(avl, uqn, idx);
+ }
+ uqn->uqn_delta += delta;
+}
+
+static void
+do_userquota_update(userquota_cache_t *cache, uint64_t used, uint64_t flags,
+ uint64_t user, uint64_t group, boolean_t subtract)
+{
+ if ((flags & DNODE_FLAG_USERUSED_ACCOUNTED)) {
+ int64_t delta = DNODE_MIN_SIZE + used;
+ char name[20];
+
+ if (subtract)
+ delta = -delta;
+
+ (void) sprintf(name, "%llx", (longlong_t)user);
+ userquota_update_cache(&cache->uqc_user_deltas, name, delta);
+
+ (void) sprintf(name, "%llx", (longlong_t)group);
+ userquota_update_cache(&cache->uqc_group_deltas, name, delta);
+ }
+}
+
+static void
+do_userobjquota_update(userquota_cache_t *cache, uint64_t flags,
+ uint64_t user, uint64_t group, boolean_t subtract)
+{
+ if (flags & DNODE_FLAG_USEROBJUSED_ACCOUNTED) {
+ char name[20 + DMU_OBJACCT_PREFIX_LEN];
+ int delta = subtract ? -1 : 1;
+
+ (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx",
+ (longlong_t)user);
+ userquota_update_cache(&cache->uqc_user_deltas, name, delta);
+
+ (void) snprintf(name, sizeof (name), DMU_OBJACCT_PREFIX "%llx",
+ (longlong_t)group);
+ userquota_update_cache(&cache->uqc_group_deltas, name, delta);
+ }
+}
+
+typedef struct userquota_updates_arg {
+ objset_t *uua_os;
+ int uua_sublist_idx;
+ dmu_tx_t *uua_tx;
+} userquota_updates_arg_t;
+
+static void
+userquota_updates_task(void *arg)
+{
+ userquota_updates_arg_t *uua = arg;
+ objset_t *os = uua->uua_os;
+ dmu_tx_t *tx = uua->uua_tx;
+ dnode_t *dn;
+ userquota_cache_t cache = { { 0 } };
+
+ multilist_sublist_t *list =
+ multilist_sublist_lock(os->os_synced_dnodes, uua->uua_sublist_idx);
+
+ ASSERT(multilist_sublist_head(list) == NULL ||
+ dmu_objset_userused_enabled(os));
+ avl_create(&cache.uqc_user_deltas, userquota_compare,
+ sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
+ avl_create(&cache.uqc_group_deltas, userquota_compare,
+ sizeof (userquota_node_t), offsetof(userquota_node_t, uqn_node));
+
+ while ((dn = multilist_sublist_head(list)) != NULL) {
+ int flags;
+ ASSERT(!DMU_OBJECT_IS_SPECIAL(dn->dn_object));
+ ASSERT(dn->dn_phys->dn_type == DMU_OT_NONE ||
+ dn->dn_phys->dn_flags &
+ DNODE_FLAG_USERUSED_ACCOUNTED);
+
+ flags = dn->dn_id_flags;
+ ASSERT(flags);
+ if (flags & DN_ID_OLD_EXIST) {
+ do_userquota_update(&cache,
+ dn->dn_oldused, dn->dn_oldflags,
+ dn->dn_olduid, dn->dn_oldgid, B_TRUE);
+ do_userobjquota_update(&cache, dn->dn_oldflags,
+ dn->dn_olduid, dn->dn_oldgid, B_TRUE);
+ }
+ if (flags & DN_ID_NEW_EXIST) {
+ do_userquota_update(&cache,
+ DN_USED_BYTES(dn->dn_phys), dn->dn_phys->dn_flags,
+ dn->dn_newuid, dn->dn_newgid, B_FALSE);
+ do_userobjquota_update(&cache, dn->dn_phys->dn_flags,
+ dn->dn_newuid, dn->dn_newgid, B_FALSE);
+ }
+
+ mutex_enter(&dn->dn_mtx);
+ dn->dn_oldused = 0;
+ dn->dn_oldflags = 0;
+ if (dn->dn_id_flags & DN_ID_NEW_EXIST) {
+ dn->dn_olduid = dn->dn_newuid;
+ dn->dn_oldgid = dn->dn_newgid;
+ dn->dn_id_flags |= DN_ID_OLD_EXIST;
+ if (dn->dn_bonuslen == 0)
+ dn->dn_id_flags |= DN_ID_CHKED_SPILL;
+ else
+ dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+ }
+ dn->dn_id_flags &= ~(DN_ID_NEW_EXIST);
+ mutex_exit(&dn->dn_mtx);
+
+ multilist_sublist_remove(list, dn);
+ dnode_rele(dn, os->os_synced_dnodes);
+ }
+ do_userquota_cacheflush(os, &cache, tx);
+ multilist_sublist_unlock(list);
+ kmem_free(uua, sizeof (*uua));
+}
+
+void
+dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx)
+{
+ if (!dmu_objset_userused_enabled(os))
+ return;
+
+ /* if this is a raw receive just return and handle accounting later */
+ if (os->os_encrypted && dmu_objset_is_receiving(os))
+ return;
+
+ /* Allocate the user/groupused objects if necessary. */
+ if (DMU_USERUSED_DNODE(os)->dn_type == DMU_OT_NONE) {
+ VERIFY0(zap_create_claim(os,
+ DMU_USERUSED_OBJECT,
+ DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
+ VERIFY0(zap_create_claim(os,
+ DMU_GROUPUSED_OBJECT,
+ DMU_OT_USERGROUP_USED, DMU_OT_NONE, 0, tx));
+ }
+
+ for (int i = 0;
+ i < multilist_get_num_sublists(os->os_synced_dnodes); i++) {
+ userquota_updates_arg_t *uua =
+ kmem_alloc(sizeof (*uua), KM_SLEEP);
+ uua->uua_os = os;
+ uua->uua_sublist_idx = i;
+ uua->uua_tx = tx;
+ /* note: caller does taskq_wait() */
+ (void) taskq_dispatch(dmu_objset_pool(os)->dp_sync_taskq,
+ userquota_updates_task, uua, 0);
+ /* callback frees uua */
+ }
+}
+
+/*
+ * Returns a pointer to data to find uid/gid from
+ *
+ * If a dirty record for transaction group that is syncing can't
+ * be found then NULL is returned. In the NULL case it is assumed
+ * the uid/gid aren't changing.
+ */
+static void *
+dmu_objset_userquota_find_data(dmu_buf_impl_t *db, dmu_tx_t *tx)
+{
+ dbuf_dirty_record_t *dr, **drp;
+ void *data;
+
+ if (db->db_dirtycnt == 0)
+ return (db->db.db_data); /* Nothing is changing */
+
+ for (drp = &db->db_last_dirty; (dr = *drp) != NULL; drp = &dr->dr_next)
+ if (dr->dr_txg == tx->tx_txg)
+ break;
+
+ if (dr == NULL) {
+ data = NULL;
+ } else {
+ dnode_t *dn;
+
+ DB_DNODE_ENTER(dr->dr_dbuf);
+ dn = DB_DNODE(dr->dr_dbuf);
+
+ if (dn->dn_bonuslen == 0 &&
+ dr->dr_dbuf->db_blkid == DMU_SPILL_BLKID)
+ data = dr->dt.dl.dr_data->b_data;
+ else
+ data = dr->dt.dl.dr_data;
+
+ DB_DNODE_EXIT(dr->dr_dbuf);
+ }
+
+ return (data);
+}
+
+void
+dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx)
+{
+ objset_t *os = dn->dn_objset;
+ void *data = NULL;
+ dmu_buf_impl_t *db = NULL;
+ uint64_t *user = NULL;
+ uint64_t *group = NULL;
+ int flags = dn->dn_id_flags;
+ int error;
+ boolean_t have_spill = B_FALSE;
+
+ if (!dmu_objset_userused_enabled(dn->dn_objset))
+ return;
+
+ /*
+ * Raw receives introduce a problem with user accounting. Raw
+ * receives cannot update the user accounting info because the
+ * user ids and the sizes are encrypted. To guarantee that we
+ * never end up with bad user accounting, we simply disable it
+ * during raw receives. We also disable this for normal receives
+ * so that an incremental raw receive may be done on top of an
+ * existing non-raw receive.
+ */
+ if (os->os_encrypted && dmu_objset_is_receiving(os))
+ return;
+
+ if (before && (flags & (DN_ID_CHKED_BONUS|DN_ID_OLD_EXIST|
+ DN_ID_CHKED_SPILL)))
+ return;
+
+ if (before && dn->dn_bonuslen != 0)
+ data = DN_BONUS(dn->dn_phys);
+ else if (!before && dn->dn_bonuslen != 0) {
+ if (dn->dn_bonus) {
+ db = dn->dn_bonus;
+ mutex_enter(&db->db_mtx);
+ data = dmu_objset_userquota_find_data(db, tx);
+ } else {
+ data = DN_BONUS(dn->dn_phys);
+ }
+ } else if (dn->dn_bonuslen == 0 && dn->dn_bonustype == DMU_OT_SA) {
+ int rf = 0;
+
+ if (RW_WRITE_HELD(&dn->dn_struct_rwlock))
+ rf |= DB_RF_HAVESTRUCT;
+ error = dmu_spill_hold_by_dnode(dn,
+ rf | DB_RF_MUST_SUCCEED,
+ FTAG, (dmu_buf_t **)&db);
+ ASSERT(error == 0);
+ mutex_enter(&db->db_mtx);
+ data = (before) ? db->db.db_data :
+ dmu_objset_userquota_find_data(db, tx);
+ have_spill = B_TRUE;
+ } else {
+ mutex_enter(&dn->dn_mtx);
+ dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+ mutex_exit(&dn->dn_mtx);
+ return;
+ }
+
+ if (before) {
+ ASSERT(data);
+ user = &dn->dn_olduid;
+ group = &dn->dn_oldgid;
+ } else if (data) {
+ user = &dn->dn_newuid;
+ group = &dn->dn_newgid;
+ }
+
+ /*
+ * Must always call the callback in case the object
+ * type has changed and that type isn't an object type to track
+ */
+ error = used_cbs[os->os_phys->os_type](dn->dn_bonustype, data,
+ user, group);
+
+ /*
+ * Preserve existing uid/gid when the callback can't determine
+ * what the new uid/gid are and the callback returned EEXIST.
+ * The EEXIST error tells us to just use the existing uid/gid.
+ * If we don't know what the old values are then just assign
+ * them to 0, since that is a new file being created.
+ */
+ if (!before && data == NULL && error == EEXIST) {
+ if (flags & DN_ID_OLD_EXIST) {
+ dn->dn_newuid = dn->dn_olduid;
+ dn->dn_newgid = dn->dn_oldgid;
+ } else {
+ dn->dn_newuid = 0;
+ dn->dn_newgid = 0;
+ }
+ error = 0;
+ }
+
+ if (db)
+ mutex_exit(&db->db_mtx);
+
+ mutex_enter(&dn->dn_mtx);
+ if (error == 0 && before)
+ dn->dn_id_flags |= DN_ID_OLD_EXIST;
+ if (error == 0 && !before)
+ dn->dn_id_flags |= DN_ID_NEW_EXIST;
+
+ if (have_spill) {
+ dn->dn_id_flags |= DN_ID_CHKED_SPILL;
+ } else {
+ dn->dn_id_flags |= DN_ID_CHKED_BONUS;
+ }
+ mutex_exit(&dn->dn_mtx);
+ if (have_spill)
+ dmu_buf_rele((dmu_buf_t *)db, FTAG);
+}
+
+boolean_t
+dmu_objset_userspace_present(objset_t *os)
+{
+ return (os->os_phys->os_flags &
+ OBJSET_FLAG_USERACCOUNTING_COMPLETE);
+}
+
+boolean_t
+dmu_objset_userobjspace_present(objset_t *os)
+{
+ return (os->os_phys->os_flags &
+ OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE);
+}
+
+static int
+dmu_objset_space_upgrade(objset_t *os)
+{
+ uint64_t obj;
+ int err = 0;
+
+ /*
+ * We simply need to mark every object dirty, so that it will be
+ * synced out and now accounted. If this is called
+ * concurrently, or if we already did some work before crashing,
+ * that's fine, since we track each object's accounted state
+ * independently.
+ */
+
+ for (obj = 0; err == 0; err = dmu_object_next(os, &obj, FALSE, 0)) {
+ dmu_tx_t *tx;
+ dmu_buf_t *db;
+ int objerr;
+
+ mutex_enter(&os->os_upgrade_lock);
+ if (os->os_upgrade_exit)
+ err = SET_ERROR(EINTR);
+ mutex_exit(&os->os_upgrade_lock);
+ if (err != 0)
+ return (err);
+
+ if (issig(JUSTLOOKING) && issig(FORREAL))
+ return (SET_ERROR(EINTR));
+
+ objerr = dmu_bonus_hold(os, obj, FTAG, &db);
+ if (objerr != 0)
+ continue;
+ tx = dmu_tx_create(os);
+ dmu_tx_hold_bonus(tx, obj);
+ objerr = dmu_tx_assign(tx, TXG_WAIT);
+ if (objerr != 0) {
+ dmu_buf_rele(db, FTAG);
+ dmu_tx_abort(tx);
+ continue;
+ }
+ dmu_buf_will_dirty(db, tx);
+ dmu_buf_rele(db, FTAG);
+ dmu_tx_commit(tx);
+ }
+ return (0);
+}
+
+int
+dmu_objset_userspace_upgrade(objset_t *os)
+{
+ int err = 0;
+
+ if (dmu_objset_userspace_present(os))
+ return (0);
+ if (dmu_objset_is_snapshot(os))
+ return (SET_ERROR(EINVAL));
+ if (!dmu_objset_userused_enabled(os))
+ return (SET_ERROR(ENOTSUP));
+
+ err = dmu_objset_space_upgrade(os);
+ if (err)
+ return (err);
+
+ os->os_flags |= OBJSET_FLAG_USERACCOUNTING_COMPLETE;
+ txg_wait_synced(dmu_objset_pool(os), 0);
+ return (0);
+}
+
+static int
+dmu_objset_userobjspace_upgrade_cb(objset_t *os)
+{
+ int err = 0;
+
+ if (dmu_objset_userobjspace_present(os))
+ return (0);
+ if (dmu_objset_is_snapshot(os))
+ return (SET_ERROR(EINVAL));
+ if (!dmu_objset_userobjused_enabled(os))
+ return (SET_ERROR(ENOTSUP));
+
+ dmu_objset_ds(os)->ds_feature_activation_needed[
+ SPA_FEATURE_USEROBJ_ACCOUNTING] = B_TRUE;
+
+ err = dmu_objset_space_upgrade(os);
+ if (err)
+ return (err);
+
+ os->os_flags |= OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE;
+ txg_wait_synced(dmu_objset_pool(os), 0);
+ return (0);
+}
+
+void
+dmu_objset_userobjspace_upgrade(objset_t *os)
+{
+ dmu_objset_upgrade(os, dmu_objset_userobjspace_upgrade_cb);
+}
+
+boolean_t
+dmu_objset_userobjspace_upgradable(objset_t *os)
+{
+ return (dmu_objset_type(os) == DMU_OST_ZFS &&
+ !dmu_objset_is_snapshot(os) &&
+ dmu_objset_userobjused_enabled(os) &&
+ !dmu_objset_userobjspace_present(os));
+}
+
void
dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
uint64_t *usedobjsp, uint64_t *availobjsp)
{
- dsl_dataset_space(os->os->os_dsl_dataset, refdbytesp, availbytesp,
+ dsl_dataset_space(os->os_dsl_dataset, refdbytesp, availbytesp,
usedobjsp, availobjsp);
}
uint64_t
dmu_objset_fsid_guid(objset_t *os)
{
- return (dsl_dataset_fsid_guid(os->os->os_dsl_dataset));
+ return (dsl_dataset_fsid_guid(os->os_dsl_dataset));
}
void
dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat)
{
- stat->dds_type = os->os->os_phys->os_type;
- if (os->os->os_dsl_dataset)
- dsl_dataset_fast_stat(os->os->os_dsl_dataset, stat);
+ stat->dds_type = os->os_phys->os_type;
+ if (os->os_dsl_dataset)
+ dsl_dataset_fast_stat(os->os_dsl_dataset, stat);
}
void
dmu_objset_stats(objset_t *os, nvlist_t *nv)
{
- ASSERT(os->os->os_dsl_dataset ||
- os->os->os_phys->os_type == DMU_OST_META);
+ ASSERT(os->os_dsl_dataset ||
+ os->os_phys->os_type == DMU_OST_META);
- if (os->os->os_dsl_dataset != NULL)
- dsl_dataset_stats(os->os->os_dsl_dataset, nv);
+ if (os->os_dsl_dataset != NULL)
+ dsl_dataset_stats(os->os_dsl_dataset, nv);
dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_TYPE,
- os->os->os_phys->os_type);
+ os->os_phys->os_type);
+ dsl_prop_nvlist_add_uint64(nv, ZFS_PROP_USERACCOUNTING,
+ dmu_objset_userspace_present(os));
}
int
dmu_objset_is_snapshot(objset_t *os)
{
- if (os->os->os_dsl_dataset != NULL)
- return (dsl_dataset_is_snapshot(os->os->os_dsl_dataset));
+ if (os->os_dsl_dataset != NULL)
+ return (os->os_dsl_dataset->ds_is_snapshot);
else
return (B_FALSE);
}
dmu_snapshot_realname(objset_t *os, char *name, char *real, int maxlen,
boolean_t *conflict)
{
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
uint64_t ignored;
- if (ds->ds_phys->ds_snapnames_zapobj == 0)
- return (ENOENT);
+ if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
+ return (SET_ERROR(ENOENT));
return (zap_lookup_norm(ds->ds_dir->dd_pool->dp_meta_objset,
- ds->ds_phys->ds_snapnames_zapobj, name, 8, 1, &ignored, MT_FIRST,
- real, maxlen, conflict));
+ dsl_dataset_phys(ds)->ds_snapnames_zapobj, name, 8, 1, &ignored,
+ MT_NORMALIZE, real, maxlen, conflict));
}
int
dmu_snapshot_list_next(objset_t *os, int namelen, char *name,
uint64_t *idp, uint64_t *offp, boolean_t *case_conflict)
{
- dsl_dataset_t *ds = os->os->os_dsl_dataset;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
zap_cursor_t cursor;
zap_attribute_t attr;
- if (ds->ds_phys->ds_snapnames_zapobj == 0)
- return (ENOENT);
+ ASSERT(dsl_pool_config_held(dmu_objset_pool(os)));
+
+ if (dsl_dataset_phys(ds)->ds_snapnames_zapobj == 0)
+ return (SET_ERROR(ENOENT));
zap_cursor_init_serialized(&cursor,
ds->ds_dir->dd_pool->dp_meta_objset,
- ds->ds_phys->ds_snapnames_zapobj, *offp);
+ dsl_dataset_phys(ds)->ds_snapnames_zapobj, *offp);
if (zap_cursor_retrieve(&cursor, &attr) != 0) {
zap_cursor_fini(&cursor);
- return (ENOENT);
+ return (SET_ERROR(ENOENT));
}
if (strlen(attr.za_name) + 1 > namelen) {
zap_cursor_fini(&cursor);
- return (ENAMETOOLONG);
+ return (SET_ERROR(ENAMETOOLONG));
}
(void) strcpy(name, attr.za_name);
return (0);
}
+int
+dmu_snapshot_lookup(objset_t *os, const char *name, uint64_t *value)
+{
+ return (dsl_dataset_snap_lookup(os->os_dsl_dataset, name, value));
+}
+
int
dmu_dir_list_next(objset_t *os, int namelen, char *name,
uint64_t *idp, uint64_t *offp)
{
- dsl_dir_t *dd = os->os->os_dsl_dataset->ds_dir;
+ dsl_dir_t *dd = os->os_dsl_dataset->ds_dir;
zap_cursor_t cursor;
zap_attribute_t attr;
/* there is no next dir on a snapshot! */
- if (os->os->os_dsl_dataset->ds_object !=
- dd->dd_phys->dd_head_dataset_obj)
- return (ENOENT);
+ if (os->os_dsl_dataset->ds_object !=
+ dsl_dir_phys(dd)->dd_head_dataset_obj)
+ return (SET_ERROR(ENOENT));
zap_cursor_init_serialized(&cursor,
dd->dd_pool->dp_meta_objset,
- dd->dd_phys->dd_child_dir_zapobj, *offp);
+ dsl_dir_phys(dd)->dd_child_dir_zapobj, *offp);
if (zap_cursor_retrieve(&cursor, &attr) != 0) {
zap_cursor_fini(&cursor);
- return (ENOENT);
+ return (SET_ERROR(ENOENT));
}
if (strlen(attr.za_name) + 1 > namelen) {
zap_cursor_fini(&cursor);
- return (ENAMETOOLONG);
+ return (SET_ERROR(ENAMETOOLONG));
}
(void) strcpy(name, attr.za_name);
return (0);
}
-struct findarg {
- int (*func)(char *, void *);
- void *arg;
-};
+typedef struct dmu_objset_find_ctx {
+ taskq_t *dc_tq;
+ dsl_pool_t *dc_dp;
+ uint64_t dc_ddobj;
+ char *dc_ddname; /* last component of ddobj's name */
+ int (*dc_func)(dsl_pool_t *, dsl_dataset_t *, void *);
+ void *dc_arg;
+ int dc_flags;
+ kmutex_t *dc_error_lock;
+ int *dc_error;
+} dmu_objset_find_ctx_t;
-/* ARGSUSED */
-static int
-findfunc(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
+static void
+dmu_objset_find_dp_impl(dmu_objset_find_ctx_t *dcp)
{
- struct findarg *fa = arg;
- return (fa->func((char *)dsname, fa->arg));
+ dsl_pool_t *dp = dcp->dc_dp;
+ dsl_dir_t *dd;
+ dsl_dataset_t *ds;
+ zap_cursor_t zc;
+ zap_attribute_t *attr;
+ uint64_t thisobj;
+ int err = 0;
+
+ /* don't process if there already was an error */
+ if (*dcp->dc_error != 0)
+ goto out;
+
+ /*
+ * Note: passing the name (dc_ddname) here is optional, but it
+ * improves performance because we don't need to call
+ * zap_value_search() to determine the name.
+ */
+ err = dsl_dir_hold_obj(dp, dcp->dc_ddobj, dcp->dc_ddname, FTAG, &dd);
+ if (err != 0)
+ goto out;
+
+ /* Don't visit hidden ($MOS & $ORIGIN) objsets. */
+ if (dd->dd_myname[0] == '$') {
+ dsl_dir_rele(dd, FTAG);
+ goto out;
+ }
+
+ thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
+ attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
+
+ /*
+ * Iterate over all children.
+ */
+ if (dcp->dc_flags & DS_FIND_CHILDREN) {
+ for (zap_cursor_init(&zc, dp->dp_meta_objset,
+ dsl_dir_phys(dd)->dd_child_dir_zapobj);
+ zap_cursor_retrieve(&zc, attr) == 0;
+ (void) zap_cursor_advance(&zc)) {
+ ASSERT3U(attr->za_integer_length, ==,
+ sizeof (uint64_t));
+ ASSERT3U(attr->za_num_integers, ==, 1);
+
+ dmu_objset_find_ctx_t *child_dcp =
+ kmem_alloc(sizeof (*child_dcp), KM_SLEEP);
+ *child_dcp = *dcp;
+ child_dcp->dc_ddobj = attr->za_first_integer;
+ child_dcp->dc_ddname = spa_strdup(attr->za_name);
+ if (dcp->dc_tq != NULL)
+ (void) taskq_dispatch(dcp->dc_tq,
+ dmu_objset_find_dp_cb, child_dcp, TQ_SLEEP);
+ else
+ dmu_objset_find_dp_impl(child_dcp);
+ }
+ zap_cursor_fini(&zc);
+ }
+
+ /*
+ * Iterate over all snapshots.
+ */
+ if (dcp->dc_flags & DS_FIND_SNAPSHOTS) {
+ dsl_dataset_t *ds;
+ err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
+
+ if (err == 0) {
+ uint64_t snapobj;
+
+ snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
+ dsl_dataset_rele(ds, FTAG);
+
+ for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
+ zap_cursor_retrieve(&zc, attr) == 0;
+ (void) zap_cursor_advance(&zc)) {
+ ASSERT3U(attr->za_integer_length, ==,
+ sizeof (uint64_t));
+ ASSERT3U(attr->za_num_integers, ==, 1);
+
+ err = dsl_dataset_hold_obj(dp,
+ attr->za_first_integer, FTAG, &ds);
+ if (err != 0)
+ break;
+ err = dcp->dc_func(dp, ds, dcp->dc_arg);
+ dsl_dataset_rele(ds, FTAG);
+ if (err != 0)
+ break;
+ }
+ zap_cursor_fini(&zc);
+ }
+ }
+
+ kmem_free(attr, sizeof (zap_attribute_t));
+
+ if (err != 0) {
+ dsl_dir_rele(dd, FTAG);
+ goto out;
+ }
+
+ /*
+ * Apply to self.
+ */
+ err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
+
+ /*
+ * Note: we hold the dir while calling dsl_dataset_hold_obj() so
+ * that the dir will remain cached, and we won't have to re-instantiate
+ * it (which could be expensive due to finding its name via
+ * zap_value_search()).
+ */
+ dsl_dir_rele(dd, FTAG);
+ if (err != 0)
+ goto out;
+ err = dcp->dc_func(dp, ds, dcp->dc_arg);
+ dsl_dataset_rele(ds, FTAG);
+
+out:
+ if (err != 0) {
+ mutex_enter(dcp->dc_error_lock);
+ /* only keep first error */
+ if (*dcp->dc_error == 0)
+ *dcp->dc_error = err;
+ mutex_exit(dcp->dc_error_lock);
+ }
+
+ if (dcp->dc_ddname != NULL)
+ spa_strfree(dcp->dc_ddname);
+ kmem_free(dcp, sizeof (*dcp));
+}
+
+static void
+dmu_objset_find_dp_cb(void *arg)
+{
+ dmu_objset_find_ctx_t *dcp = arg;
+ dsl_pool_t *dp = dcp->dc_dp;
+
+ /*
+ * We need to get a pool_config_lock here, as there are several
+ * asssert(pool_config_held) down the stack. Getting a lock via
+ * dsl_pool_config_enter is risky, as it might be stalled by a
+ * pending writer. This would deadlock, as the write lock can
+ * only be granted when our parent thread gives up the lock.
+ * The _prio interface gives us priority over a pending writer.
+ */
+ dsl_pool_config_enter_prio(dp, FTAG);
+
+ dmu_objset_find_dp_impl(dcp);
+
+ dsl_pool_config_exit(dp, FTAG);
}
/*
- * Find all objsets under name, and for each, call 'func(child_name, arg)'.
- * Perhaps change all callers to use dmu_objset_find_spa()?
+ * Find objsets under and including ddobj, call func(ds) on each.
+ * The order for the enumeration is completely undefined.
+ * func is called with dsl_pool_config held.
*/
int
-dmu_objset_find(char *name, int func(char *, void *), void *arg, int flags)
+dmu_objset_find_dp(dsl_pool_t *dp, uint64_t ddobj,
+ int func(dsl_pool_t *, dsl_dataset_t *, void *), void *arg, int flags)
{
- struct findarg fa;
- fa.func = func;
- fa.arg = arg;
- return (dmu_objset_find_spa(NULL, name, findfunc, &fa, flags));
+ int error = 0;
+ taskq_t *tq = NULL;
+ int ntasks;
+ dmu_objset_find_ctx_t *dcp;
+ kmutex_t err_lock;
+
+ mutex_init(&err_lock, NULL, MUTEX_DEFAULT, NULL);
+ dcp = kmem_alloc(sizeof (*dcp), KM_SLEEP);
+ dcp->dc_tq = NULL;
+ dcp->dc_dp = dp;
+ dcp->dc_ddobj = ddobj;
+ dcp->dc_ddname = NULL;
+ dcp->dc_func = func;
+ dcp->dc_arg = arg;
+ dcp->dc_flags = flags;
+ dcp->dc_error_lock = &err_lock;
+ dcp->dc_error = &error;
+
+ if ((flags & DS_FIND_SERIALIZE) || dsl_pool_config_held_writer(dp)) {
+ /*
+ * In case a write lock is held we can't make use of
+ * parallelism, as down the stack of the worker threads
+ * the lock is asserted via dsl_pool_config_held.
+ * In case of a read lock this is solved by getting a read
+ * lock in each worker thread, which isn't possible in case
+ * of a writer lock. So we fall back to the synchronous path
+ * here.
+ * In the future it might be possible to get some magic into
+ * dsl_pool_config_held in a way that it returns true for
+ * the worker threads so that a single lock held from this
+ * thread suffices. For now, stay single threaded.
+ */
+ dmu_objset_find_dp_impl(dcp);
+ mutex_destroy(&err_lock);
+
+ return (error);
+ }
+
+ ntasks = dmu_find_threads;
+ if (ntasks == 0)
+ ntasks = vdev_count_leaves(dp->dp_spa) * 4;
+ tq = taskq_create("dmu_objset_find", ntasks, maxclsyspri, ntasks,
+ INT_MAX, 0);
+ if (tq == NULL) {
+ kmem_free(dcp, sizeof (*dcp));
+ mutex_destroy(&err_lock);
+
+ return (SET_ERROR(ENOMEM));
+ }
+ dcp->dc_tq = tq;
+
+ /* dcp will be freed by task */
+ (void) taskq_dispatch(tq, dmu_objset_find_dp_cb, dcp, TQ_SLEEP);
+
+ /*
+ * PORTING: this code relies on the property of taskq_wait to wait
+ * until no more tasks are queued and no more tasks are active. As
+ * we always queue new tasks from within other tasks, task_wait
+ * reliably waits for the full recursion to finish, even though we
+ * enqueue new tasks after taskq_wait has been called.
+ * On platforms other than illumos, taskq_wait may not have this
+ * property.
+ */
+ taskq_wait(tq);
+ taskq_destroy(tq);
+ mutex_destroy(&err_lock);
+
+ return (error);
}
/*
- * Find all objsets under name, call func on each
+ * Find all objsets under name, and for each, call 'func(child_name, arg)'.
+ * The dp_config_rwlock must not be held when this is called, and it
+ * will not be held when the callback is called.
+ * Therefore this function should only be used when the pool is not changing
+ * (e.g. in syncing context), or the callback can deal with the possible races.
*/
-int
-dmu_objset_find_spa(spa_t *spa, const char *name,
- int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags)
+static int
+dmu_objset_find_impl(spa_t *spa, const char *name,
+ int func(const char *, void *), void *arg, int flags)
{
dsl_dir_t *dd;
- dsl_pool_t *dp;
+ dsl_pool_t *dp = spa_get_dsl(spa);
dsl_dataset_t *ds;
zap_cursor_t zc;
zap_attribute_t *attr;
uint64_t thisobj;
int err;
- if (name == NULL)
- name = spa_name(spa);
- err = dsl_dir_open_spa(spa, name, FTAG, &dd, NULL);
- if (err)
+ dsl_pool_config_enter(dp, FTAG);
+
+ err = dsl_dir_hold(dp, name, FTAG, &dd, NULL);
+ if (err != 0) {
+ dsl_pool_config_exit(dp, FTAG);
return (err);
+ }
/* Don't visit hidden ($MOS & $ORIGIN) objsets. */
if (dd->dd_myname[0] == '$') {
- dsl_dir_close(dd, FTAG);
+ dsl_dir_rele(dd, FTAG);
+ dsl_pool_config_exit(dp, FTAG);
return (0);
}
- thisobj = dd->dd_phys->dd_head_dataset_obj;
+ thisobj = dsl_dir_phys(dd)->dd_head_dataset_obj;
attr = kmem_alloc(sizeof (zap_attribute_t), KM_SLEEP);
- dp = dd->dd_pool;
/*
* Iterate over all children.
*/
if (flags & DS_FIND_CHILDREN) {
for (zap_cursor_init(&zc, dp->dp_meta_objset,
- dd->dd_phys->dd_child_dir_zapobj);
+ dsl_dir_phys(dd)->dd_child_dir_zapobj);
zap_cursor_retrieve(&zc, attr) == 0;
(void) zap_cursor_advance(&zc)) {
- ASSERT(attr->za_integer_length == sizeof (uint64_t));
- ASSERT(attr->za_num_integers == 1);
-
- child = kmem_alloc(MAXPATHLEN, KM_SLEEP);
- (void) strcpy(child, name);
- (void) strcat(child, "/");
- (void) strcat(child, attr->za_name);
- err = dmu_objset_find_spa(spa, child, func, arg, flags);
- kmem_free(child, MAXPATHLEN);
- if (err)
+ ASSERT3U(attr->za_integer_length, ==,
+ sizeof (uint64_t));
+ ASSERT3U(attr->za_num_integers, ==, 1);
+
+ child = kmem_asprintf("%s/%s", name, attr->za_name);
+ dsl_pool_config_exit(dp, FTAG);
+ err = dmu_objset_find_impl(spa, child,
+ func, arg, flags);
+ dsl_pool_config_enter(dp, FTAG);
+ strfree(child);
+ if (err != 0)
break;
}
zap_cursor_fini(&zc);
- if (err) {
- dsl_dir_close(dd, FTAG);
+ if (err != 0) {
+ dsl_dir_rele(dd, FTAG);
+ dsl_pool_config_exit(dp, FTAG);
kmem_free(attr, sizeof (zap_attribute_t));
return (err);
}
* Iterate over all snapshots.
*/
if (flags & DS_FIND_SNAPSHOTS) {
- if (!dsl_pool_sync_context(dp))
- rw_enter(&dp->dp_config_rwlock, RW_READER);
err = dsl_dataset_hold_obj(dp, thisobj, FTAG, &ds);
- if (!dsl_pool_sync_context(dp))
- rw_exit(&dp->dp_config_rwlock);
if (err == 0) {
- uint64_t snapobj = ds->ds_phys->ds_snapnames_zapobj;
+ uint64_t snapobj;
+
+ snapobj = dsl_dataset_phys(ds)->ds_snapnames_zapobj;
dsl_dataset_rele(ds, FTAG);
for (zap_cursor_init(&zc, dp->dp_meta_objset, snapobj);
zap_cursor_retrieve(&zc, attr) == 0;
(void) zap_cursor_advance(&zc)) {
- ASSERT(attr->za_integer_length ==
+ ASSERT3U(attr->za_integer_length, ==,
sizeof (uint64_t));
- ASSERT(attr->za_num_integers == 1);
-
- child = kmem_alloc(MAXPATHLEN, KM_SLEEP);
- (void) strcpy(child, name);
- (void) strcat(child, "@");
- (void) strcat(child, attr->za_name);
- err = func(spa, attr->za_first_integer,
- child, arg);
- kmem_free(child, MAXPATHLEN);
- if (err)
+ ASSERT3U(attr->za_num_integers, ==, 1);
+
+ child = kmem_asprintf("%s@%s",
+ name, attr->za_name);
+ dsl_pool_config_exit(dp, FTAG);
+ err = func(child, arg);
+ dsl_pool_config_enter(dp, FTAG);
+ strfree(child);
+ if (err != 0)
break;
}
zap_cursor_fini(&zc);
}
}
- dsl_dir_close(dd, FTAG);
+ dsl_dir_rele(dd, FTAG);
kmem_free(attr, sizeof (zap_attribute_t));
+ dsl_pool_config_exit(dp, FTAG);
- if (err)
+ if (err != 0)
return (err);
- /*
- * Apply to self if appropriate.
- */
- err = func(spa, thisobj, name, arg);
- return (err);
+ /* Apply to self. */
+ return (func(name, arg));
}
-/* ARGSUSED */
+/*
+ * See comment above dmu_objset_find_impl().
+ */
int
-dmu_objset_prefetch(char *name, void *arg)
+dmu_objset_find(char *name, int func(const char *, void *), void *arg,
+ int flags)
{
- dsl_dataset_t *ds;
-
- if (dsl_dataset_hold(name, FTAG, &ds))
- return (0);
-
- if (!BP_IS_HOLE(&ds->ds_phys->ds_bp)) {
- mutex_enter(&ds->ds_opening_lock);
- if (!dsl_dataset_get_user_ptr(ds)) {
- uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH;
- zbookmark_t zb;
-
- zb.zb_objset = ds->ds_object;
- zb.zb_object = 0;
- zb.zb_level = -1;
- zb.zb_blkid = 0;
-
- (void) arc_read_nolock(NULL, dsl_dataset_get_spa(ds),
- &ds->ds_phys->ds_bp, NULL, NULL,
- ZIO_PRIORITY_ASYNC_READ,
- ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE,
- &aflags, &zb);
- }
- mutex_exit(&ds->ds_opening_lock);
- }
+ spa_t *spa;
+ int error;
- dsl_dataset_rele(ds, FTAG);
- return (0);
+ error = spa_open(name, &spa, FTAG);
+ if (error != 0)
+ return (error);
+ error = dmu_objset_find_impl(spa, name, func, arg, flags);
+ spa_close(spa, FTAG);
+ return (error);
}
void
dmu_objset_set_user(objset_t *os, void *user_ptr)
{
- ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock));
- os->os->os_user_ptr = user_ptr;
+ ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
+ os->os_user_ptr = user_ptr;
}
void *
dmu_objset_get_user(objset_t *os)
{
- ASSERT(MUTEX_HELD(&os->os->os_user_ptr_lock));
- return (os->os->os_user_ptr);
+ ASSERT(MUTEX_HELD(&os->os_user_ptr_lock));
+ return (os->os_user_ptr);
}
+
+/*
+ * Determine name of filesystem, given name of snapshot.
+ * buf must be at least ZFS_MAX_DATASET_NAME_LEN bytes
+ */
+int
+dmu_fsname(const char *snapname, char *buf)
+{
+ char *atp = strchr(snapname, '@');
+ if (atp == NULL)
+ return (SET_ERROR(EINVAL));
+ if (atp - snapname >= ZFS_MAX_DATASET_NAME_LEN)
+ return (SET_ERROR(ENAMETOOLONG));
+ (void) strlcpy(buf, snapname, atp - snapname + 1);
+ return (0);
+}
+
+/*
+ * Call when we think we're going to write/free space in open context to track
+ * the amount of dirty data in the open txg, which is also the amount
+ * of memory that can not be evicted until this txg syncs.
+ */
+void
+dmu_objset_willuse_space(objset_t *os, int64_t space, dmu_tx_t *tx)
+{
+ dsl_dataset_t *ds = os->os_dsl_dataset;
+ int64_t aspace = spa_get_worst_case_asize(os->os_spa, space);
+
+ if (ds != NULL) {
+ dsl_dir_willuse_space(ds->ds_dir, aspace, tx);
+ dsl_pool_dirty_space(dmu_tx_pool(tx), space, tx);
+ }
+}
+
+#if defined(_KERNEL) && defined(HAVE_SPL)
+EXPORT_SYMBOL(dmu_objset_zil);
+EXPORT_SYMBOL(dmu_objset_pool);
+EXPORT_SYMBOL(dmu_objset_ds);
+EXPORT_SYMBOL(dmu_objset_type);
+EXPORT_SYMBOL(dmu_objset_name);
+EXPORT_SYMBOL(dmu_objset_hold);
+EXPORT_SYMBOL(dmu_objset_hold_flags);
+EXPORT_SYMBOL(dmu_objset_own);
+EXPORT_SYMBOL(dmu_objset_rele);
+EXPORT_SYMBOL(dmu_objset_rele_flags);
+EXPORT_SYMBOL(dmu_objset_disown);
+EXPORT_SYMBOL(dmu_objset_from_ds);
+EXPORT_SYMBOL(dmu_objset_create);
+EXPORT_SYMBOL(dmu_objset_clone);
+EXPORT_SYMBOL(dmu_objset_stats);
+EXPORT_SYMBOL(dmu_objset_fast_stat);
+EXPORT_SYMBOL(dmu_objset_spa);
+EXPORT_SYMBOL(dmu_objset_space);
+EXPORT_SYMBOL(dmu_objset_fsid_guid);
+EXPORT_SYMBOL(dmu_objset_find);
+EXPORT_SYMBOL(dmu_objset_byteswap);
+EXPORT_SYMBOL(dmu_objset_evict_dbufs);
+EXPORT_SYMBOL(dmu_objset_snap_cmtime);
+EXPORT_SYMBOL(dmu_objset_dnodesize);
+
+EXPORT_SYMBOL(dmu_objset_sync);
+EXPORT_SYMBOL(dmu_objset_is_dirty);
+EXPORT_SYMBOL(dmu_objset_create_impl_dnstats);
+EXPORT_SYMBOL(dmu_objset_create_impl);
+EXPORT_SYMBOL(dmu_objset_open_impl);
+EXPORT_SYMBOL(dmu_objset_evict);
+EXPORT_SYMBOL(dmu_objset_register_type);
+EXPORT_SYMBOL(dmu_objset_do_userquota_updates);
+EXPORT_SYMBOL(dmu_objset_userquota_get_ids);
+EXPORT_SYMBOL(dmu_objset_userused_enabled);
+EXPORT_SYMBOL(dmu_objset_userspace_upgrade);
+EXPORT_SYMBOL(dmu_objset_userspace_present);
+EXPORT_SYMBOL(dmu_objset_userobjused_enabled);
+EXPORT_SYMBOL(dmu_objset_userobjspace_upgrade);
+EXPORT_SYMBOL(dmu_objset_userobjspace_upgradable);
+EXPORT_SYMBOL(dmu_objset_userobjspace_present);
+#endif